To die for an idea is to set a rather high price upon conjecture.

Nine tenths of education is encouragement.

The man of science multiples the points of contact between man and nature.

Universal peace will be realized, not because man will become better, but because a new order of things, a new science, new economic necessities, will impose peace.

Truth possesses within herself a penetrating force, unknown alike to error and falsehood. I say 'truth' and you understand my meaning. For the beautiful words truth and justice need not to be defined in order to be understood in their true sense.

The duty of literature is to note what counts, and to light up what is suited to the light. If it ceases to choose and to love, it becomes like a woman who gives herself without preference.

Only men who are not interested in women are interested in women's clothes. Men who like women never notice what they wear.