Richard Sibbes contra "Threshold Christianity"/Decisionalism (Works, Vol. 4, pp. 257-258):
[W]e all expect glory in heaven; and how can we do that except we be fitted for it? The church is the fitting place for glory. We enter into heaven in the church here. We are hewn and squared here. If we be not holy here, we shall never enter into heaven. There must be a change begun here if ever it be perfected in heaven. ‘No unclean thing shall come there,’ Rev. 21:27. As soon as ever Satan, an angel of light, sinned, he was tumbled out of heaven. It will brook no unclean thing; no unclean thing shall ever come there again. Therefore our nature must be altered suitable to that place and glorious condition, before we come to heaven. Except we be new born, we cannot enter into the kingdom of God. There is direct Scripture for it. Beloved, this is forgot. Men trust to the grace and mercy of God, and look not after a change; and this holds many from embracing the gospel in the truth of it; rom knowing Christ as the truth is in him. They hear they must be changed, which they are unwilling to. They believe that God is merciful, and that Christ died, &c. They snatch so much of the gospel, as may serve to build them up in self-love. So far they think all is well. But when they see such grace as must teach them ‘to deny ungodliness and worldly lusts,’ Titus 2:12, and such grace as must change and alter them, this they cannot brook. They are content to go to heaven if they may have it in a way to hell; in maintaining their corruptions; being proud and covetous and worldly, as they are. This must not be.