Life is like riding a bicycle. To keep your balance, you must keep moving.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

A person who never made a mistake never tried anything new.

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

The only source of knowledge is experience.

No problem can be solved from the same level of consciousness that created it.

There are two ways to live: you can live as if nothing is a miracle; you can live as if everything is a miracle.

Let every man be respected as an individual and no man idolized.

Memory is deceptive because it is colored by today's events.