"Whenever you find a man who says he does not believe in a real Right and Wrong, you will find the same man going back on this a moment later. He may break his promise to you, but if you try breaking one to him he will be complaining 'It's not fair' before you can say Jack Robinson," (p. 19).

"It may be a great advance in knowledge not to believe in witches: there is no moral advance in not executing them when you do not think they are there. You would not call a man humane for ceasing to set mousetraps if he did so because he believed there were no mice in the house," (p. 26).

"It begins to look as if we shall have to admit that there is more than one kind of reality; that, in this particular case, there is something above and beyond the...