Of all forms of caution, caution in love is perhaps the most fatal to true happiness.

What has human happiness to do with morals? The object of morals is not to make people happy.

Prison is a severe and terrible punishment; but for me, thanks to Arthur Balfour, this was not so. I was much cheered on my arrival by the warder at the gate, who had to take particulars about me. He asked my religion, and I replied 'agnostic.' He asked how to spell it, and remarked with a sigh: 'Well, there are many religions, but I suppose they all worship the same God.' This remark kept me cheerful for about a week.

There is as much difference between a collection of mentally free citizens and a community molded by modern methods of propaganda as there is between a heap of raw materials and a battleship.

I never held Negroes to be inherently inferior. The statement in Marriage and Morals refers to environmental conditioning. I have had it withdrawn from subsequent editions because it is clearly ambiguous.

Even if we could be certain that one of the world's religions were perfectly true, given the sheer number of conflicting faiths on offer, every believer should expect damnation purely as a matter of probability.

All exact science is dominated by the idea of approximation.