Let no-one ignorant of geometry enter. Said to have been inscribed above the door of Plato's Academy.

Poverty doesn't come because of the decrease of wealth but because of the increase of desires.

Let brother help brother.

A grateful mind is a great mind which eventually attracts to itself great things.

Thinking: the talking of the soul with itself.

That is very high praise, which is given you by faithful witness.

All I really know is the extent of my own ignorance