Anyone interested can see several men who say the same thing, much clearer than I did, but the same thing over and over;
http://www.studylight.org/commentary/hebrews/12-22.html
and here is John Owen;
"Zion Isaiah , First, the place of God's habitation, where He dwells forever: Psalm 9:11; 76:2. Second, it is the seat of the throne, reign and kingdom of Christ: Psalm 2:6; Isaiah 24:23. Third, it is the object of Divine promises innumerable: Psalm 125:1; 128:5 , of Christ Himself: Isaiah 59:20. Fourth, thence did the Gospel proceed and the law of Christ come forth: Isaiah 40:9 , Micah 4:2. Fifth, it was the object of God's especial love, and the place of the birth of His elect: Psalm 87:2 , 5. Sixth, the joy of the whole earth: Psalm 48:2. Seventh, salvation and all blessings came forth out of Zion: Psalm 14:7; 110:2; 128:5. Now these things were not spoken of nor accomplished towards that Mount Zion which was in Jerusalem absolutely, but only as it was typical of believers under the Gospel; so the meaning of the apostle Isaiah , that by the Gospel believers do come to that state wherein they have an interest in and a right to all the blessed and glorious things that are spoken in the Scriptures concerning and to Zion. All the privileges ascribed, all the promises made to it, are theirs. Zion is the place of God's especial gracious residence, of the throne of Christ in His reign, the object of all promises. This is the first privilege of believers under the Gospel. They come to Mount Zion, they are interested in the promises of God recorded in the Scriptures made to Zion; in all the love and care of God expressed towards it, in all the spiritual glories assigned to it. The things spoken of it were never accomplished in the earthly Zion, but only typically; spiritually, and in their reality, they belong to believers under the new testament" (John Owen).
The contrasts between Sinai and Sion were very marked. The former was located in one of the dreariest and driest places on earth, a "howling desert"; the other was situated in the midst of that land which flowed with milk and honey. The one was ugly, barren, forbidding; the other was "beautiful for situation, the joy of the whole earth." Sinai was enveloped in "blackness and darkness," while Sion signified "sunny" or "shone upon." God came down on Sinai for only a brief moment, but He dwells in Sion "forever." On the former He appeared in terrible majesty; in the other He is manifested in grace and blessing. At Sinai the typical mediator trembled and quaked; on Sion Christ is crowned with glory and honor.
"But ye are come to Mount Sion." By this, then, we understand, First, that in being brought to Christ, the believer comes to the antitypical, the spiritual, Sion. Second, more specifically, we understand by this expression that believers are come to the Throne of Grace. Just as, originally, the historical Sion was a menace to Israel, so while we were under the curse of the law God's throne was one of judgment. But, just as David (the "Beloved") secured Sion for Israel and it became the place of blessing, where God abode in grace, so as the result of Christ's work the Throne of Heaven has become the Throne of Grace, He being Himself seated thereon. Third, in its wider scope, it signifies that believers have a right or title to all the good and glorious things spoken of and to Sion in the O.T.
"And unto the City of the living God, the heavenly Jerusalem," by which we understand Heaven itself, of which the earthly Jerusalem—the seat and center of the worship of God—was the emblem. From earliest times the saints were taught by the Holy Spirit to contemplate the future blessedness of the righteous under the image of a splendid "City," reared on permanent foundations. Of Abraham it is declared, "He looked for a city which hath foundation, whose Builder and Maker is God" ( Hebrews 11:10). The force of that statement is best perceived in the light of the previous verse: "By faith he sojourned in the land of promise, as in a strange country, dwelling in tents with Isaac and Jacob, the heirs with him of the same promise." Abraham was given to realize that Canaan was but a figure of his everlasting heritage, and therefore did he look forward to (verse 10), "seek" (verse 14), and "desire a better Country, that Isaiah , a heavenly" (verse 14). The eternal Abode of the blessed is there called both a "City" and a "Country."
Many are the allusions to this "City" in the Psalm and the Prophets: we single out a few of the more prominent ones. "There is a river (The Spirit), the streams (His graces) whereof shall make glad the city of God, the holy place of the tabernacles of the Most High" ( Psalm 46:4). "Great is the Lord, and greatly to be praised in the city of our God, in the mountain of His holiness" ( Psalm 48:1). "Glorious things are spoken of thee, O city of God" ( Psalm 87:3). "He led them forth by the right way, that they might go to a city of habitation" ( Psalm 107:7). "We have a strong city; salvation will God appoint for walls and bulwarks" ( Isaiah 26:1). It is to be noted that in several passages the "City" is mentioned with particular reference to "Zion," for we can only have access to God via the Throne of Grace: John 14:6.
The "City of the living God" intimates the nearness of the saints to God, for Jerusalem was adjacent to Zion—their homes and dwellings were near to His. This figure of the "city" is also found in "Ye are no more strangers and foreigners, but fellow-citizens with the saints, and of the household of God" ( Ephesians 2:19)—see too Revelation 3:12. It is designated "the heavenly Jerusalem" in contrast from the earthly, the "Jerusalem which is above is free, which is the mother of us all" ( Galatians 4:26). It is referred to again in Hebrews 13:14. A "city" is a place of permanent residence, in contrast from the moving tent of the wilderness. In Bible times a "city" was a place of safety, being surrounded by strong and high walls; so in Heaven we shall be eternally secure from sin and Satan, death and every enemy. A city is well stocked with provisions: so in Heaven nothing is lacking which is good and blessed.
"But ye are come unto . . . the City of the living God, the heavenly Jerusalem." "The apostle herein prefers the privileges of the Gospel not only above what the people were made partakers of at Sinai in the wilderness, but also above all that they afterwards enjoyed in Jerusalem in the land of Canaan. In the glory and privileges of that city the Hebrews greatly boasted. But the apostle casts that city in the state wherein it then was, into the same condition with Mount Sinai in Arabia, that Isaiah , under bondage, as indeed it then was ( Galatians 4:25); and he opposeth thereunto that ‘Jerusalem which is above,' that Isaiah , this heavenly Jerusalem. This the second privilege of the Gospel-state, wherein all the remaining promises of the O.T. are transferred and made over to believers: whatever is spoken of the city of God or of Jerusalem that is spiritual, that contains in it the love or favor of God, it is all made theirs; faith can lay a claim to it all.
"Believers are so ‘come' to this city, as to be inhabitants, free denizens, possessors of it, to whom all the fights, privileges, and immunities of it do belong; and what is spoken of it in the Scripture is a ground of faith to them, and a spring of consolation. For they may with consolation make application of what is so spoken to themselves in every condition. A ‘city' is the only place of rest, peace, safety and honor, among men in this world: to all these in the spiritual sense we are brought by the Gospel. Whilst men are under the law they are at Sinai—in a wilderness where is none of these things; the souls of sinners can find no place of rest or safety under the law. But we have all these things by the Gospel: rest in Christ, peace with God, order in the communion of faith, safety in Divine protection, and honor in our relation to God in Christ" (John Owen).
http://www.studylight.org/commentary/hebrews/12-22.html
and here is John Owen;
"Zion Isaiah , First, the place of God's habitation, where He dwells forever: Psalm 9:11; 76:2. Second, it is the seat of the throne, reign and kingdom of Christ: Psalm 2:6; Isaiah 24:23. Third, it is the object of Divine promises innumerable: Psalm 125:1; 128:5 , of Christ Himself: Isaiah 59:20. Fourth, thence did the Gospel proceed and the law of Christ come forth: Isaiah 40:9 , Micah 4:2. Fifth, it was the object of God's especial love, and the place of the birth of His elect: Psalm 87:2 , 5. Sixth, the joy of the whole earth: Psalm 48:2. Seventh, salvation and all blessings came forth out of Zion: Psalm 14:7; 110:2; 128:5. Now these things were not spoken of nor accomplished towards that Mount Zion which was in Jerusalem absolutely, but only as it was typical of believers under the Gospel; so the meaning of the apostle Isaiah , that by the Gospel believers do come to that state wherein they have an interest in and a right to all the blessed and glorious things that are spoken in the Scriptures concerning and to Zion. All the privileges ascribed, all the promises made to it, are theirs. Zion is the place of God's especial gracious residence, of the throne of Christ in His reign, the object of all promises. This is the first privilege of believers under the Gospel. They come to Mount Zion, they are interested in the promises of God recorded in the Scriptures made to Zion; in all the love and care of God expressed towards it, in all the spiritual glories assigned to it. The things spoken of it were never accomplished in the earthly Zion, but only typically; spiritually, and in their reality, they belong to believers under the new testament" (John Owen).
The contrasts between Sinai and Sion were very marked. The former was located in one of the dreariest and driest places on earth, a "howling desert"; the other was situated in the midst of that land which flowed with milk and honey. The one was ugly, barren, forbidding; the other was "beautiful for situation, the joy of the whole earth." Sinai was enveloped in "blackness and darkness," while Sion signified "sunny" or "shone upon." God came down on Sinai for only a brief moment, but He dwells in Sion "forever." On the former He appeared in terrible majesty; in the other He is manifested in grace and blessing. At Sinai the typical mediator trembled and quaked; on Sion Christ is crowned with glory and honor.
"But ye are come to Mount Sion." By this, then, we understand, First, that in being brought to Christ, the believer comes to the antitypical, the spiritual, Sion. Second, more specifically, we understand by this expression that believers are come to the Throne of Grace. Just as, originally, the historical Sion was a menace to Israel, so while we were under the curse of the law God's throne was one of judgment. But, just as David (the "Beloved") secured Sion for Israel and it became the place of blessing, where God abode in grace, so as the result of Christ's work the Throne of Heaven has become the Throne of Grace, He being Himself seated thereon. Third, in its wider scope, it signifies that believers have a right or title to all the good and glorious things spoken of and to Sion in the O.T.
"And unto the City of the living God, the heavenly Jerusalem," by which we understand Heaven itself, of which the earthly Jerusalem—the seat and center of the worship of God—was the emblem. From earliest times the saints were taught by the Holy Spirit to contemplate the future blessedness of the righteous under the image of a splendid "City," reared on permanent foundations. Of Abraham it is declared, "He looked for a city which hath foundation, whose Builder and Maker is God" ( Hebrews 11:10). The force of that statement is best perceived in the light of the previous verse: "By faith he sojourned in the land of promise, as in a strange country, dwelling in tents with Isaac and Jacob, the heirs with him of the same promise." Abraham was given to realize that Canaan was but a figure of his everlasting heritage, and therefore did he look forward to (verse 10), "seek" (verse 14), and "desire a better Country, that Isaiah , a heavenly" (verse 14). The eternal Abode of the blessed is there called both a "City" and a "Country."
Many are the allusions to this "City" in the Psalm and the Prophets: we single out a few of the more prominent ones. "There is a river (The Spirit), the streams (His graces) whereof shall make glad the city of God, the holy place of the tabernacles of the Most High" ( Psalm 46:4). "Great is the Lord, and greatly to be praised in the city of our God, in the mountain of His holiness" ( Psalm 48:1). "Glorious things are spoken of thee, O city of God" ( Psalm 87:3). "He led them forth by the right way, that they might go to a city of habitation" ( Psalm 107:7). "We have a strong city; salvation will God appoint for walls and bulwarks" ( Isaiah 26:1). It is to be noted that in several passages the "City" is mentioned with particular reference to "Zion," for we can only have access to God via the Throne of Grace: John 14:6.
The "City of the living God" intimates the nearness of the saints to God, for Jerusalem was adjacent to Zion—their homes and dwellings were near to His. This figure of the "city" is also found in "Ye are no more strangers and foreigners, but fellow-citizens with the saints, and of the household of God" ( Ephesians 2:19)—see too Revelation 3:12. It is designated "the heavenly Jerusalem" in contrast from the earthly, the "Jerusalem which is above is free, which is the mother of us all" ( Galatians 4:26). It is referred to again in Hebrews 13:14. A "city" is a place of permanent residence, in contrast from the moving tent of the wilderness. In Bible times a "city" was a place of safety, being surrounded by strong and high walls; so in Heaven we shall be eternally secure from sin and Satan, death and every enemy. A city is well stocked with provisions: so in Heaven nothing is lacking which is good and blessed.
"But ye are come unto . . . the City of the living God, the heavenly Jerusalem." "The apostle herein prefers the privileges of the Gospel not only above what the people were made partakers of at Sinai in the wilderness, but also above all that they afterwards enjoyed in Jerusalem in the land of Canaan. In the glory and privileges of that city the Hebrews greatly boasted. But the apostle casts that city in the state wherein it then was, into the same condition with Mount Sinai in Arabia, that Isaiah , under bondage, as indeed it then was ( Galatians 4:25); and he opposeth thereunto that ‘Jerusalem which is above,' that Isaiah , this heavenly Jerusalem. This the second privilege of the Gospel-state, wherein all the remaining promises of the O.T. are transferred and made over to believers: whatever is spoken of the city of God or of Jerusalem that is spiritual, that contains in it the love or favor of God, it is all made theirs; faith can lay a claim to it all.
"Believers are so ‘come' to this city, as to be inhabitants, free denizens, possessors of it, to whom all the fights, privileges, and immunities of it do belong; and what is spoken of it in the Scripture is a ground of faith to them, and a spring of consolation. For they may with consolation make application of what is so spoken to themselves in every condition. A ‘city' is the only place of rest, peace, safety and honor, among men in this world: to all these in the spiritual sense we are brought by the Gospel. Whilst men are under the law they are at Sinai—in a wilderness where is none of these things; the souls of sinners can find no place of rest or safety under the law. But we have all these things by the Gospel: rest in Christ, peace with God, order in the communion of faith, safety in Divine protection, and honor in our relation to God in Christ" (John Owen).