The truth is often a terrible weapon of aggression. It is possible to lie, and even to murder, with the truth.

There is a law that man should love his neighbor as himself. In a few hundred years it should be as natural to mankind as breathing or the upright gait; but if he does not learn it he must perish.

A simple rule in dealing with those who are hard to get along with is to remember that this person is striving to assert his superiority; and you must deal with him from that point of view.

Each generation has its few great mathematicians, and mathematics would not even notice the absence of the others. They are useful as teachers, and their research harms no one, but it is of no importance at all. A mathematician is great or he is nothing.

Every individual acts and suffers in accordance with his peculiar teleology, which has all the inevitability of fate, so long as he does not understand it.

What person, confined in a small room with nothing but a tea-cosy, will not eventually put the tea-cosy on their head?

The chief danger in life is that you may take too many precautions.