He who is not everyday conquering some fear has not learned the secret of life.

Don't be too timid and squeamish about your actions. All life is an experiment.

A man is a god in ruins. When men are innocent, life shall be longer, and shall pass into the immortal, as gently as we awake from dreams.

As soon as there is life there is danger.

People disparage knowing and the intellectual life, and urge doing. I am content with knowing, if only I could know.