"The worst sin towards our fellow creatures is not to hate them, but to be indifferent to them; that's the essence of inhumanity."

"Do not do unto others as you would they should do unto you. Their tastes may not be the same."

"A perpetual holiday is a good working definition of hell."

"He who can does. He who cannot teaches."

"The golden rule is that there are no golden rules."

"I am not a teacher: only a fellow-traveller of whom you asked the way. I pointed ahead - ahead of myself as well as you."

"The single biggest problem in communication is the illusion that it has taken place."

"This is the true joy in life - that being used for a purpose recognised by yourself as a mighty one."

"Success covers a multitude of blunders."

"Activity is the only road to knowledge."

"The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man."

"The English are not very spiritual people, so they invented cricket to give them some idea of eternity."

"Education is a succession of eye-openers each involving the repudiation of some previously held belief."