“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 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.

He who knows how to speak, knows also when.

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

Fellow, stand away from my diagram.