“He who knows how to speak, knows also when.”

Give me but a firm spot on which to stand, and I shall move the earth.

Man has always learned from past. After all, you can’t learn history in reverse.

There are things which seem incredible to most men who have not studied mathematics.

Don’t disturb my circles!

Mathematics reveals its secrets only to those who approach it with pure love, for its own beauty.

Rise above oneself and grasp the world.

Give me a place to stand, and a lever long enough, and I will move the world.

Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.

Those who claim to discover everything but produce no proofs of the same may be confused as having actually pretended to discover the impossible.

Give me a place to stand, and I will move the Earth.

Fellow, stand away from my diagram.

A man can be himself only so long as he is alone; and if he does not love solitude, he will not love freedom; for it is only when he is alone that he is really free.

Time is by my side I’m not running forward for time is not behind.

If you win, you need not have to explain. If you lose, you should not be there to explain!

It is a waste of energy to be angry with a man who behaves badly, just as it is to be angry with a car that won’t go.

I loved you with all my heart turns out a whole for some is barely apart.

Ripples in the water slowly fade away they make way for the larger waves that stay.

I want to go, look for my essence, know myself and change myself; because nobody is constant.

Whoever wishes to become a philosopher must learn not to be frightened by absurdities.