1. He shows how far persons may go in religion, and, after all, fall away, and perish for ever, v. 4, 5. (1.) They may be enlightened. Some of the ancients understand this of their being baptized; but it is rather to be understood of notional knowledge and common illumination, of which persons may have a great deal, and yet come short of heaven. Balaam was the man whose eyes were opened (Num. 24:3), and yet with his eyes opened he went down to utter darkness. (2.) They may taste of the heavenly gift, feel something of the efficacy of the Holy Spirit in his operations upon their souls, causing them to taste something of religion, and yet be like persons in the market, who taste of what they will not come up to the price of, and so but take a taste, and leave it. Persons may taste religion, and seem to like it, if they could have it upon easier terms than denying themselves, and taking up their cross, and following Christ. (3.) They may be made partakers of the Holy Ghost, that is, of his extraordinary and miraculous gifts; they may have cast out devils in the name of Christ, and done many other mighty works. Such gifts in the apostolic age were sometimes bestowed upon those who had no true saving grace. (4.) They may taste of the good word of God; they may have some relish of gospel doctrines, may hear the word with pleasure, may remember much of it, and talk well of it, and yet never be cast into the form and mould of it, nor have it dwelling richly in them. (5.) They may have tasted of the powers of the world to come; they may have been under strong impressions concerning heaven, and dread of going to hell. These lengths hypocrites may go, and, after all, turn apostates. Now hence observe, [1.] These great things are spoken here of those who may fall away; yet it is not here said of them that they were truly converted, or that they were justified; there is more in true saving grace than in all that is here said of apostates. [2.] This therefore is no proof of the final apostasy of true saints. These indeed may fall frequently and foully, but yet they will not totally nor finally from God; the purpose and the power of God, the purchase and the prayer of Christ, the promise of the gospel, the everlasting covenant that God has made with them, ordered in all things and sure, the indwelling of the Spirit, and the immortal seed of the word, these are their security. But the tree that has not these roots will not stand.