Galatians 6:4,5

The best antidote for such false estimates of self is severe self-criticism. Let a man judge his own work, not by comparison with others, but by the ideal standard, then he will see what it is worth and how much he has to boast of. His boasting will be at least real, and not based upon any delusive comparisons. He must stand or fall by himself. He must bear the weight of his own virtues and his own sins. By them he will be judged, and not by any fancied superiority or inferiority to others. For the thought, compare 2 Corinthians 10:12.