Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

When a man is sufficiently motivated, discipline will take care of itself.

Out of the multitude of our sense experiences we take, mentally and arbitrarily, certain repeatedly occurring complexes of sense impression (partly in conjunction with sense impressions which are interpreted as signs for sense experiences of others), and we attribute to them a meaning the meaning of the bodily object.

Experience is knowledge. All the rest is information.

We are here for the sake of others

To the extent math refers to reality, we are not certain to the extent we are certain, math does not refer to reality.

I speak to everyone in the same way, whether he is the garbage man or the president of the university.