It is impossible that the whole of truth should not be present at every time and every place, available for anyone who desires it.

Man alone can enslave man.

Every atheist is an idolater- unless he is worshipping the true God in his impersonal aspect. The majority of the pious are idolaters.

Just as a person who is always asserting that he is too good-natured is the very one from whom to expect, on some occasion, the coldest and most unconcerned cruelty, so when any group sees itself as the bearer of civilization this very belief will betray it into behaving barbarously at the first opportunity.

Misfortunes leave wounds which bleed drop by drop even in sleep; thus little by little they train man by force and dispose him to wisdom in spite of himself. Man must learn to think ofhimself as a limited and dependent being; and only suffering teaches him this.

We have to endure the discordance between imagination and fact. It is better to say, “I am suffering,” than to say, “This landscape is ugly.

One could count on one's fingers the number of scientists throughout the world with a general idea of the history and development of their particular science: there is none who is really competent as regards sciences other than his own. As science forms an indivisible whole, one may say that there are no longer, strictly speaking, scientists, but only drudges doing scientific work.