Geniuses are commonly believed to excel other men in their power of sustained attention . . . But it is their genius making them attentive, not their attention making geniuses of them.

I wished by treating Psychology like a natural science, to help her become one.

Truth, as any dictionary will tell you, is a property of certain of our ideas. It means their agreement, as falsity means their disagreement, with reality.

Truth in our ideas means their power to work.

Our lives are like islands in the sea, or like trees in the forest. The maple and the pine may whisper to each other with their leaves ... But the trees also commingle their roots in the darkness underground, and the islands also hang together through the ocean's bottom.

The subjectivist in morals, when his moral feelings are at war with the facts about him, is always free to seek harmony by toningdown the sensitiveness of the feelings.

We forget that every good that is worth possessing must be paid for in strokes of daily effort.