Do it because it's in your heart. Not because you want something in return. Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for.

The life of which meaning one never ponders is not worth living

Pride divides the men, humility joins them.

In every sort of danger there are various ways of winning through, if one is ready to do and say anything whatever.

Only the knowledge that comes from inside is the real Knowledge

Wisdom is knowing what you don't know.

Whatever authority I may have rests solely on knowing how little I know.