Even the most scientific investigator in science, the most thoroughgoing Positivist, cannot dispense with fiction; he must at least make use of categories, and they are already fictions, analogical fictions, or labels, which give us the same pleasure as children receive when they are told the "name" of a thing.

For every fresh stage in our lives we need a fresh education, and there is no stage for which so little educational preparation is made as that which follows the reproductive period.

The modesty of women, which, in its most primitive form among animals, is based on sexual periodicity, is, with that periodicity, an essential condition of courtship.

Still, whether we like it or not, the task of speeding up the decrease of the human population becomes increasingly urgent.

Greek is the embodiment of the fluent speech that runs or soars, the speech of a people which could not help giving winged feet toits god of art. Latin is the embodiment of the weighty and concentrated speech which is hammered and pressed and polished into the shape of its perfection, as the ethically minded Romans believed that the soul also should be wrought.

The greatest task before civilization at present is to make machines what they ought to be, the slaves, instead of the masters of men.

Jealousy, that dragon which slays love under the pretence of keeping it alive.