No wise man can have a contempt for the prejudices of others; and he should even stand in a certain awe of his own, as if they were aged parents and monitors. They may in the end prove wiser than he.

He who has a task to perform must know how to take sides, or he is quite unworthy of it.

Our prejudices are our mistresses; reason is at best our wife, very often heard indeed, but seldom minded.

Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.

One can only give an unbiased opinion about things that do not interest one, which is no doubt the reason an unbiased opinion is always valueless. The man who sees both sides of a question is a man who sees absolutely nothing.