I hear and I forget. I see and I remember. I do and I understand.

It's not that I'm so smart. It's just that I stay with problems longer.

Teaching should be such that what is offered is perceived as a valuable gift and not as a hard duty.

Nationalism is an infantile sickness. It is the measles of the human race.

Before you speak, ask yourself: Is it kind, is it necessary, is it true, does it improve on the silence?