We should try to be the parents of our future rather than the offspring of our past.

Use harms and even destroys beauty. The noblest function of an object is to be contemplated.

True science teaches, above all, to doubt and be ignorant.

Man dies of cold, not of darkness.

All knowledge has an ultimate goal. Knowledge for the sake of knowledge is, say what you will, nothing but a dismal begging of the question.

A man does not die of love or his liver or even of old age; he dies of being a man.

The will, the will not ever to die, the refusal to resign oneself to death, ceaselessly builds the house of life while the keen blasts and icy winds of reason unceasingly batter at the structure and beat it down.