The ordinary adult never gives a thought to space-time problems ... I, on the contrary, developed so slowly that I did not begin to wonder about space and time until I was an adult. I then delved more deeply into the problem than any other adult or child would have done.

One always likes to do the things for which one has ability.

Live life to the fullest. You have to color outside the lines once in a while if you want to make your life a masterpiece. Laugh some every day. Keep growing, keep dreaming, keep following your heart. The important thing is not to stop questioning.

Compound interest is the eighth wonder of the world. He who understands it, earns it ... he who doesn't ... pays it.

The most important thing is to not stop questioning.

The only real valuable thing is intuition. The intellect has little to do on the road to discovery

The only real valuable thing is intuition.