We must not expect simple answers to far-reaching questions. However far our gaze penetrates, there are always heights beyond which block our vision.

It is natural to think that an abstract science cannot be of much importance in affairs of human life, because it has omitted from its consideration everything of real interest.

What is morality in any given time or place? It is what the majority then and there happen to like and immorality is what they dislike.

It is a profoundly erroneous truism, repeated by all copy books and by eminent people when they are making speeches, that we should cultivate the habit of thinking of what we are doing. The precise opposite is the case. Civilization advances by extending the number of important operations which we can perform without thinking about them.

Fertilization of the soul is the reason for the necessity of art.

Education with inert ideas is not only useless; it is above all things harmful.

The safest general characterization of the European philosophical tradition is that it consists of a series of footnotes to Plato.