From John Calvin (1509-1564) in his Institutes of the Christian Religion:
Plato sometimes says that the life of a philosopher is a meditation upon death; but we may more truly say that the life of a Christian man is a continual effort and exercise in the mortification of the flesh, till it is utterly slain, and God’s Spirit reigns in us. Therefore, I think he has profited greatly who has learned to be very much displeased with himself, not so as to stick fast in this mire and progress no farther, but rather to hasten to God and yearn for him in order that, having been engrafted into the life and death of Christ, he may give attention to continual repentance. Truly, they who are held by a real loathing of sin cannot do otherwise. For no one every hates sin unless he has previously been seized with a love of righteousness, (pg. 614-615).
HT: Kevin DeYoung