A good liar must have a good memory.

Purity of heart is to will one thing.

You can have everything in life that you want if you just give enough other people what they want.

Nothing is black or white.

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Few men have virtue to withstand the highest bidder.

Tradition becomes our security, and when the mind is secure it is in decay.

A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales.?

I have no idea. People who boast about their IQ are losers.

A mediocre idea that generates enthusiasm will go further than a great idea that inspires no one.

Of all the things I`ve lost I miss my mind the most.

When it is not in our power to determine what is true, we ought to follow what is most probable.

I feel as if I were a piece in a game of chess, when my opponent says of it: That piece cannot be moved.

Most ballet teachers in the United States are terrible. If they were in medicine, everyone would be poisoned.

He alone, who owns the youth, gains the future.

A place for everything, and everything in its place.

Go on, get out. Last words are for fools who haven't said enough.

A scientific man ought to have no wishes, no affections, - a mere heart of stone.

Central banks don't have divine wisdom. They try to do the best analysis they can and must be prepared to stand or fall by the quality of that analysis.

Sunlight is painting.

The death of a beautiful woman, is unquestionably the most poetical topic in the world.