It's coexistence or no existence..

Beware the man of the single book.

All the time that he can spare from the adornment of his person, he devotes to the neglect of his duties..

Every great idea starts out as a blasphemy..

Calculus required continuity, and continuity was supposed to require the infinitely little; but nobody could discover what the infinitely little migh….

Children, after being limbs of Satan in traditional theology and mystically illuminated angels in the minds of educational reformers, have reverted t….

Nine-tenths of the activities of a modern Government are harmful; therefore the worse they are performed, the better..

War grows out of ordinary human nature..

I do wish I believed in the life eternal, for it makes me quite miserable to think man is merely a kind of machine endowed, unhappily for himself, wi….

While I am as convinced a Socialist as the most ardent Marxian, I do not regard Socialism as a gospel of proletarian revenge, nor even, primarily, as….

Meantime, the world in which we exist has other aims. But it will pass away, burnt up in the fire of its own hot passions; and from its ashes will s….

Sir Arthur Eddington deduces religion from the fact that atoms do not obey the laws of mathematics. Sir James Jeans deduces it from the fact that the….

Heretical views arise when the truth is uncertain, and it is only when the truth is uncertain that censorship is invoked..

Science, by itself, cannot supply us with an ethic. It can show us how to achieve a given end, and it may show us that some ends cannot be achieved. ….

It is not by delusion, however exalted, that mankind can prosper, but only by unswerving courage in the pursuit of truth..

In spite of Death, the mark and seal of the parental control, Man is yet free, during his brief years, to examine, to criticise, to know, and in imag….

But it is just this characteristic of simplicity in the laws of nature hitherto discovered which it would be fallacious to generalize, for it is obvi….

A widespread belief is more often likely to be foolish than sensible..

The problem with the wise is they are so filled with doubts while the dull are so certain..

The degree of one's emotions varies inversely with one's knowledge of the facts - the less you know the hotter you get..

Any pleasure that does no harm to other people is to be valued..