The thinking that got us to where we are is not the thinking that will get us to where we want to be.

We are all very ignorant. What happens is that not all ignore the same things.

This is too difficult for a mathematician. It takes a philosopher. The hardest thing in the world to understand is the income tax.

The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle.

The only way to escape the personal corruption of praise is to go on working. One is tempted to stop and listen to it. The only thing is to turn away and go on working. Work. There is nothing else.

One always likes to do the things for which one has ability.

There are two different conceptions about the nature of the universe: (1) the world as a unity dependent on humanity; (2) the world as a reality independent of the human factor.