Self knowledge is best learned, not by contemplation, but action. Strive to do your duty and you will soon discover of what stuff you are made. Johann Wolfgang von Goethe
Only as you do know yourself can your brain serve you as a sharp and efficient tool. Know your own failings, passions, and prejudices so you can separate them from what you see. Bernard Baruch
The knowledge of yourself will preserve you from vanity. Miguel de Cervantes
It is a great thing to know our vices. Cicero
Know thyself! A maxim as pernicious as it is ugly. Whoever observes himself arrests his own development. A caterpillar who wanted to know itself well would never become a butterfly. Andre Gide
Knowing others is intelligence; knowing yourself is true wisdom. Mastering others is strength; mastering yourself is true power. Lao Tzu
An humble knowledge of thyself is a surer way to God than a deep search after learning. Thomas a Kempis
The beginning of self-knowledge: recognizing that your motives are the same as other people’s. Mason Cooley
Resolve to be thyself; and know that who finds himself, loses his misery. Matthew Arnold
He knows himself, and all that’s in him, who knows adversity. Herman Melville