This is some of the best advice I've ever heard or given.

T he W isdom of C ormac Be not too wise, nor too foolish, Be not too conceited, nor too diffident, Be not too haughty, nor too humble, Be not too talkative, nor too silent, Be not too hard, nor too feeble. For: If you be too wise, one will expect too much of you; If you be foolish, you will be deceived; If you be too conceited, you will be thought vexatious; If you be too humble, you will be without honour; If you be too talkative, you will not be heeded; If you be too silent, you will not be regarded; If you be too hard, you will be broken; If you be too feeble you will be crushed. "It is through these habits, that the young become old and kingly warriors." Thus spake Cormac