Every idea, extended into infinity, becomes its own opposite.

What is rational is actual and what is actual is rational. On this conviction the plain man like the philosopher takes his stand,and from it philosophy starts in its study of the universe of mind as well as the universe of nature.

The heart is everywhere, and each part of the organism is only the specialized force of the heart itself.

In the case of various kinds of knowledge, we find that what in former days occupied the energies of men of mature mental ability sinks to the level of information, exercises, and even pastimes for children; and in this educational progress we can see the history of the world's culture delineated in faint outline.

We learn from history that man can never learn anything from history.

The spirit is never at rest, but always engaged in progressive motion, giving itself new form.

Serious occupation is labor that has reference to some want.