Don't be too critical

I. 56

There is a man I know who is very clever, but it was in his pedantic nature to always point out sloppy work. This is something a first-rate vassal should not do. Of you are unaware that the world is teeming with ineptitude from the beginning, you will develop a bitter countenance, and in turn others will eschew you. If you aren't acknowledged and trusted by others, you will not be able to demonstrate your true worth, no matter how outstanding a person you may actually be. Know that this is also a blemish on one's honor that invites ruin.