But courage in fighting is by no means the only form, nor perhaps even the most important. There is courage in facing poverty, courage in facing deri….

Many a man will have the courage to die gallantly, but will not have the courage to say, or even to think, that the cause for which he is asked to di….

What makes a free thinker is not his beliefs, but the way in which he holds them. If he holds them because his elders told him they were true when he….

The triumph of science has been mainly due to its practical utility, and there has been an attempt to divorce this aspect from that of theory, thus m….

We do not like to be robbed of an enemy; we want someone to hate when we suffer. It is so depressing to think that we suffer because we are fools; ye….

It is only in marriage with the world that our ideals can bear fruit; divorced from it, they remain barren..

I think people who are unhappy are always proud of being so, and therefore do not like to be told that there is nothing grand about their unhappiness….

No satisfaction based upon self-deception is solid..

Love, children, and work, are the great sources of fertilizing contact between the individual and the rest of the world..

To a mind of sufficient intellectual power, the whole of mathematics would appear trivial, as trivial as the statement that a four-footed animal is a….

One is often told that it is a very wrong thing to attack religion, because religion makes men virtuous. So I am told; I have not noticed it..

Thinking you know when in fact you don't is a fatal mistake, to which we are all prone.

Everybody can do something toward creating in his own environment kindly feelings rather than anger, reasonableness rather than hysteria, happiness r….

I am sometimes shocked by the blasphemies of those who think themselves pious..

What we cannot think we cannot think, therefore we also cannot say what we cannot think..

The satisfaction to be derived from success in a great constructive enterprise is one of the most massive that life has to offer..

The scientific attitude of mind involves a sweeping away of all other desires in the interests of the desire to know-it involves suppression of hopes….

What the world needs is not dogma but an attitude of scientific inquiry combined with a belief that the torture of millions is not desirable, whether….

I cannot escape from the conclusion that the great ages of progress have depended upon a small number of individuals of transcendent ability..

Descartes, the father of modern philosophy ... would never-so he assures us-have been led to construct his philosophy if he had had only one teacher,….

My conclusion is that there is no reason to believe any of the dogmas of traditional theology and, further, that there is no reason to wish that they….