There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.
If you know how to listen, everyone is a guru.
Doubt is not a very agreeable state, but certainty is a ridiculous one.
It is impossible for a man to learn what he thinks he already knows.
Blessed is the man, who having nothing to say, abstains from giving wordy evidence of the fact.
Real knowledge is to know the extent of one's ignorance.
I've not yet succeeded in obeying the Delphic injunction to know myself, and it seems to me absurd to consider problems about other beings while I am still in ignorance about my own nature.
If you want to know what a man's like, take a good look at how he treats his inferiors, not his equals.
The haft of the arrow had been feathered with one of the eagles own plumes. We often give our enemies the means of our own destruction.
Every man I meet is my superior in some way. In that, I learn of him.