Most unhappiness is caused because people listen to themselves... instead of talking to themselves.

Science must constantly be reminded that her purposes are not the only purposes and that the order of uniform causation which she has use for, and is therefore right in postulating, may be enveloped in a wider order, on which she has no claim at all.

If you want a quality, act as if you already had it.

There is an organic affinity between joyousness and tenderness.

How can the moribund old man reason back to himself the romance, the mystery, the imminence of great things with which our old earth tingled for him in the days when he was young and well?

The mind of your own enemy, the pupil, is working away from you, as keenly and eagerly as is the mind of the commander on the other side from the scientific general. Just what the respective enemies want and think, and what they know or do not know, are as hard things for the teachers as for the general to find out.

Pretend what we may, the whole man within us is at work when we form our philosophical opinions.