The human mind has first to construct forms, independently, before we can find them in things.

Marriage is but slavery made to appear civilized.

One should never impose one's views on a problem; one should rather study it, and in time a solution will reveal itself.

If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut

To have security against atomic bombs and against the other biological weapons, we have to prevent war, for if we cannot prevent war every nation will use every means that is at their disposal; and in spite of all promises they make, they will do it. At the same time, so long as war is not prevented, all the governments of the nations have to prepare for war, and if you have to prepare for war, then you are in a state where you cannot abolish war.

There exists a passion for comprehension, just as there exists a passion for music. That passion is rather common in children, but gets lost in most people later on. Without this passion there would be neither mathematics nor natural science.

I have just got a new theory of eternity.