Isn't it ironic that today people say, 'If you know the love of God, you don't have to worry when you go on in sin.' But the apostle John said, 'If you know the love of God, you won't be able to go on in sin.'
John PiperIf you live gladly to make others glad in God, your life will be hard, your risks will be high, and your joy will be full.
John PiperSo 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 Piper