It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

The whole secret of existence is to have no fear. Never fear what will become of you, depend on no one. Only the moment you reject all help are you free.

Give peace a chance.

Mathematics is the key and door to the sciences.

Pearls don't lie on the sea shore. If you want one, you must dive for it.

“The whole secret of existence is to have no fear. Never fear what will become of you, depend on no one. Only the moment you reject all help are you freed.”

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.