Everywhere in the world there are ignorance and prejudice, but the greatest complex of these, with the most extensive prestige and the most intimate entanglement with traditional institutions, is the Roman Catholic Church.

In all the round world there is no meat. There used to be. But now we cannot stand the thought of slaughterhouses.

Human history becomes more and more a race between education and catastrophe.

Every time I see an adult on a bicycle, I no longer despair for the future of the human race.

For after the Battle comes quiet.

You must follow me carefully. I shall have to controvert one or two ideas that are almost universally accepted. The geometry, for instance, they taught you at school is founded on a misconception.

No passion in the world is equal to the passion to alter someone else's draft.