When the history of civilization is written, it will be a biological history and Margaret Sanger will be its heroine.

A young mistress is better than an old master.

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

We must be prepared to see an Association of Nations in conference growing into an organic system of world controls for world affairs and the keeping of the world’s peace, or we must be prepared for – a continuation of war.

Few people realise the immensity of vacancy in which the dust of the material universe swims.

Since the passing of Victoria the Great there had been an accumulating uneasiness in the national life. It was as if some compact and dignified paper-weight had been lifted from people's ideas, and as if at once they had begun to blow about anyhow.

The science hangs like a gathering fog in a valley, a fog which begins nowhere and goes nowhere, an incidental, unmeaning inconvenience to passers-by.