1368 Man His Own Worst Enemy
I have often said that a man has no enemy deadlier than he himself; for my experience has taught me that I have greater cause for fear within me than I have outside me, because the gifts which we have within us tend to inflate our nature.
As God, who is by nature very kind, cannot but graciously shower down upon us various gifts, such as a healthy and sound body, riches, wisdom, skill, knowledge of Scripture, etc., so we cannot but become proud of these gifts and arrogant. Our life is wretched without such gifts of God, but it is doubly wretched when we have them. For we are made doubly worse by them. So great is the corruption of original sin, although all men except believers are either unaware of its existence or consider it a trivial matter.