The white tails of rabbits, according to some theologians, have a purpose, namely to make it easier for sportsmen to shoot them.

There may be no good reasons for very many opinions that are held with passion.

The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widely spread belief is more likely to be foolish than sensible.

Fundamental happiness depends more than anything else upon what may be called a friendly interest in persons and things.

What is best in mathematics deserves not merely to be learnt as a task, but to assimilated as a part of daily thought, and brought again and again before the mind with ever-renewed encouragement.

In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.

Right conduct can never, except by some rare accident, be promoted by ignorance or hindered by knowledge.