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

You are a wicked motorcar, and I shall not give you any more petrol until you go.

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 was young, or if he holds them because if he did not he would be unhappy, his thought is not free; but if he holds them because, after careful thought, he finds a balance in their favor, then his thought is free, however odd his conclusions may seem.

The Mormons had a divine revelation in favour of polygamy, but under pressure from the United States Government they discovered that the revelation was not binding.

All the conditions of happiness are realized in the life of the man of science.

The good life is one inspired by love and guided by knowledge.

And if there were a God, I think it very unlikely that He would have such an uneasy vanity as to be offended by those who doubt His existence