Men know not all their faults, oxen all their strength

Similar sayings:

Think of your own faults the first part of the night when you are awake, and the faults of others the latter part of the night when you are asleep Think of your own faults the first part of the night when you are awake, and the faults of others the latter part of the night when you are asleep
Everyone should carefully observe which way his heart draws him, and then choose that way with all his strength Everyone should carefully observe which way his heart draws him, and then choose that way with all his strength
A man must plough with such oxen as he hath A man must plough with such oxen as he hath
Deal with the faults of others as gently as with your own Deal with the faults of others as gently as with your own
Better a dinner of herbs than a stalled ox where hate is Better a dinner of herbs than a stalled ox where hate is

Chinese sayings and proverbs