A man of Seville is shaved by the Barber of Seville if and only if the man does not shave himself. Does the barber shave himself?

William James describes a man who got the experience from laughing-gas; whenever he was under its influence, he knew the secret of the universe, but when he came to, he had forgotten it. At last, with immense effort, he wrote down the secret before the vision had faded. When completely recovered, he rushed to see what he had written. It was 'A smell of petroleum prevails throughout'.

Ants and savages put strangers to death.

You must believe that you can help bring about a better world.

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

[There has been] every kind of cruelty practiced upon all sorts of people in the name of religion.

If the West can claim superiority in anything, it is . . . in science and scientific technique.