One can know nothing of giving aught that is worthy to give unless one also knows how to take.

It is curious how there seems to be an instinctive disgust in Man for his nearest ancestors and relations. If only Darwin could conscientiously have traced man back to the Elephant or the Lion or the Antelope, how much ridicule and prejudice would have been spared to the doctrine of Evolution.

All civilization has from time to time become a thin crust over a volcano of revolution.

Philosophy is a purely personal matter. A genuine philosopher's credo is the outcome of a single complex personality; it cannot be transferred. No two persons, if sincere, can have the same philosophy.

There is nothing that war has ever achieved that we could not better achieve without it.

The relation of the individual person to the species he belongs to is the most intimate of all relations.

The romantic embrace can only be compared with music and with prayer.