Sex lies at the root of life, and we can never learn to reverence life until we know how to understand sex.

Socialism also brings us up against the hard rock of eugenic fact which, if we neglect it, will dash our most beautiful social construction to fragments.

Man lives by imagination.

The family only represents one aspect, however important an aspect, of a human being's functions and activities. A life is beautiful and ideal or the reverse, only when we have taken into our consideration the social as well as the family relationship.

Here, where we reach the sphere of mathematics, we are among processes which seem to some the most inhuman of all human activities and the most remote from poetry. Yet it is here that the artist has the fullest scope of his imagination.

The mathematician has reached the highest rung on the ladder of human thought.

Education, whatever else it should or should not be, must be an inoculation against the poisons of life and an adequate equipment in knowledge and skill for meeting the chances of life.