At the age of eleven, I began Euclid, with my brother as my tutor. This was one of the great events of my life, as dazzling as first love. I had not imagined there was anything so delicious in the world. From that moment until I was thirty-eight, mathematics was my chief interest and my chief source of happiness.

The resistance to a new idea increases by the square of its importance.

There's a Bible on that shelf there. But I keep it next to Voltaire - poison and antidote.

There was, I think, never any reason to believe in any innate superiority of the male, except his superior muscle.

We are told that Sin consists in acting contrary to God's commands, but we are also told that God is omnipotent. . . . This leads to frightful results. . . . The British State considers it the duty of an Englishman to kill people who are not English whenever a collection of elderly gentlemen in Westminster tells him to do so. . . . Church and State are placable enemies of both intelligence and virtue.

Right discipline consists, not in external compulsion, but in the habits of mind which lead spontaneously to desirable rather than undesirable activities.

It is odd that neither the Church nor modern public opinion condemns petting, provided it stops short at a certain point. At what point sin begins is a matter as to which casuists differ. One eminently orthodox Catholic divine laid it down that a confessor may fondle a nun's breasts, provided he does it without evil intent. But I doubt whether modern authorities would agree with him on this point.