If we had known everything in this universe, we would have had to find another universe to feed our curiosity, because what keeps alive man is the curiosity!

If the universe has an end, it means we are captive fishes in an aquarium! If it has no end, we are lost sheep in the eternal darkness!

It is better to go near the truth and be imprisoned than to stay with the wrong and roam about freely, master Galilei. In fact, getting attached to falsity is terrible slavery, and real freedom is only next to the right.

The secret of success lies in this simple sentence: Why not?

A well educated man with an independent mind is a type of man liked by no government!

Poverty is a mathematical proof of the fact that mankind is a big failure!

Every man must be like Stephen Hawking. His body is here on earth, but his mind walks in the universe!