It is little enough we know and the rest is darkness.

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.

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.

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

The history of the world is the record of a man in quest of his daily bread and butter.

....This world needs Utopias as it needs fairy stories. It does not matter so much where we are going, as long as we are making consciously for some definite goal. And a Utopia, however strange or fanciful, is the only possible beacon upon the uncharted seas of the distant future.

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