Quote

Thought must be divided against itself before it can come to any knowledge of itself.

Ideas come from somewhere. People don't come up with these ideas from nowhere. Something triggers your thoughts.

The vitality of thought is in adventure. Ideas won't keep. Something must be done about them. When the idea is new, its custodians have fervor, live for it, and if need be, die for it.

Every suggested idea produces a corresponding physical reaction. Every idea constantly repeated ends by being engraved upon the brain, provoking the act which corresponds to that idea.

Ideas sometimes come from nowhere, and sometimes they take lots of thinking.

Any idea, plan, or purpose may be placed in the mind through repetition of thought.

This kind of overall way of thinking is not only a fertile source of new theoretical ideas: it is needed for the human mind to function in a generally harmonious way, which could in turn help to make possible an orderly and stable society.

Ideas emerge when a part of the real or imagined world is studied for its own sake.