We should keep the dead before our eyes, and honor them as though still living

If I hold up one corner of a square and the student cannot workout the other three for himself, I won't go any further.

Riches and honor are what everyone desires, but if they can be gained only by doing evil, they must not be held. Don't worry about not being in office, worry about qualifying yourself for office. Don't worry that no one knows you, but seek to be worthy of being known.

Who keeps the old akindle and adds new knowledge is fitted to be a teacher.

Reading without thinking will confuse you.Thinking without reading will place you in danger.

If you know, say you know. If you don't know, say you don't know.

The ideal teacher guides his students but does not pull them along; he urges them to go forward and does not suppress them; he opens the way but does not take them to the place.