We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.

If you treat an individual as he is, he will remain as he is. But if you treat him as if he were what he ought to be and could be, he will become what he ought and could be.

Enjoy when you can, and endure when you must.

Beware of dissipating your powers; strive constantly to concentrate them. Genius thinks it can do whatever it sees others doing, but is sure to repent of every ill-judged outlay.

Treat people as if they were what they should be, and you help them become what they are capable of becoming.

Mathematicians are like Frenchmen: whatever you say to them they translate into their own language, and forthwith it is something entirely different.

More light! Give me more light!

We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.