So saving grace, converting grace, for Augustine, is God's giving us a sovereign joy in God that triumphs over all other joys and therefore sways the will. The will is free to move toward whatever it delights in most fully, but it is not within the power of our will to determine what that sovereign joy will be.
John PiperThe great barrier to worship among God's people is not that we are always seeking our own satisfaction, but that our seeking is so weak and half-hearted that we settle for little sips at broken cisterns when the fountain of life is just over the next hill.
John PiperDoing things in secret that you are ashamed for others to know is practical atheism. God's knowing doesn't count?
John PiperThis is God's universal purpose for all Christian suffering: more contentment in God and less satisfaction in the world.
John PiperSuffering in the path of Christian obedience, with joy - because the steadfast love of the Lord is better than life (Psalm 63:3) - is the clearest display of the worth of God in our lives. Therefore, faith-filled suffering is essential in this world for the most intense, authentic worship. When we are most satisfied with God in suffering, he will be most glorified in us in worship. Our problem is not styles of music. Our problem is styles of life. When we embrace more affliction for the worth of Christ, there will be more fruit in the worship of Christ.
John Piper