The world is in dreadful need of men who will assume the new leadership - who will have the courage of their own visions and who will recognise clearly that we are only at the beginning of the voyage, and have to learn an entirely new system of seamanship.

An ignorant person is, by the very fact of his or her ignorance, a very dangerous person.

Life means progress, and progress means suffering.

A few drops of science will often disinfect an entire barrel full of ignorance and prejudice.

In history as in life it is success that counts. Start a political upheaval and let yourself be caught, and you will hang as a traitor. But place yourself at the head of a rebellion and gain your point, and all future generations will worship you as the Father of their Country.

Any formal attack on ignorance is bound to fail because the masses are always ready to defend their most precious possession - their ignorance.

The foundation for a new era was laid but yesterday. The human was given its first chance to become truly civilised when it took courage to question all things and made 'knowledge and understanding' the foundation upon which to create a more reasonable and sensible society of human beings.