Science is a cemetery of dead ideas, even though life may issue from them.

To believe in God is to yearn for His existence and, furthermore, it is to act as if He did exist.

Fear is the start of wisdom.

Martyrs create faith, faith does not create martyrs.

Knowledge for the sake of knowledge! Truth for truth's sake! This is inhuman.

These terrible sociologists, who are the astrologers and alchemists of our twentieth century.

Chemistry ought to be not for chemists alone.