First, a few comments without going to the scripture exactly...
"I dont think it is something you wake up one day and do, or that God just says that is it...I am done with you." What a heartbreaking way to live....never knowing if you have lost your salvation or not, wondering which sin it is that may send you over the edge back into lostness of unbelief, would God let me know when He was done with me....Where is the rest, where is the joy, where is the peace? When would you know that you had satisfied the requirements to keep your salvation? What kind of hope is that? Is it hope at all? How can that kind of hope be an anchor for my soul? I do not see anywhere in the Word that God reveals Him as having this kind of character.
God chose us in Christ before the foundation of the world that we should be holy and blameless before Him; He predestined us to be conformed to the image of His son; He put His Holy Spirit in us to cause us to walk in His ways; He gave us to Christ, Who said He came to seek and to save that which was lost, that His sheep know His voice and will not follow another; Jesus said He did not lose any except the son of perdition and that in order to fulfill scripture.
Warning: “He who endures to the end will be saved” (Mark 13:13). Promise: “He who began a good work in you will bring it to completion at the day of Jesus Christ” (Philippians 1:6).
Heb 7:25 Therefore He is able also to save forever those who draw near to God through Him, since He always lives to make intercession for them.
Luke 22:32 -- But I have prayed for thee, that thy faith fail not: and when thou art converted, strengthen thy brethren.
Yes, there are warnings, but there are also the promises that He is the One who will keep us; He is the Guardian of our soul; we are protected by His power until the day of redemption...because we believed (received the word implanted); some did not believe (receive the word implanted) but let the word bounce off the fallow ground of their hearts, others heard the word and emotionally responded allowing the seed to rest on the rocky soil of their hearts but only considered it temporarily because when the emotions changed due to affliction or persecution they were chose not to receive it implanted, others considered the word intellectually for a while but in the face of the cares of this world and the deceitfulness of wealth intellectualized it away not receiving it implanted...and thus this group never were among the truly saved. Peter exhorts us to make certain of His calling us in 2 Peter 1 after he has given us the evidence we need to examine ourselves by. Paul exhorts us in 2 Cor 13:5 - "Test yourselves to see if you are in the faith; examine yourselves! Or do you not recognize this about yourselves, that Jesus Christ is in you -- unless indeed you fail the test?"
1 Cor 15:1-2
Now I make known to you, brethren, the gospel which I preached to you, which also you received, in which also you stand, by which also you are saved, if you hold fast the word which I preached to you, unless you believed in vain. (eike - without purpose, inconsiderately, groundlessly, without cause, to no purpose --- Just like the commandment to not take the name of God in vain. I don't believe it means not to use his name as a swear word but rather to not take His name upon us, identifying Him as our God, without it having any effect on us or our lives.)
I am especially struck by a theme I see coursing all through the New Testament. Jesus told the parable about the sower, the seed, the soil, and the hearer. He talked about two trees. He said the tree would be known by its fruit and to make it either good or bad. Bad cannot produce good fruit and vice versa.