Acoustics Quote by Jacques Loeb

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

— Scott Reed

...an idea is no more an even relatively constant thing than is a feeling or emotion or volitional process. There exist only changing and…

— Wilhelm Wundt

An idea is our visual reaction to something seen - in real life, in our memory, in our imagination, in our dreams.

— Anna Held

Whatever is immediately perceived is an idea: and can any idea exist out of the mind?

— George Berkeley

Our ideas are only intellectual instruments which we use to break into phenomena; we must change them when they have served their purpose, as…

— Claude Bernard

The dog, on the other hand, has few or no ideas because his brain acts in coarse fashion and because there are few connections…

— Edward Thorndike

Experiments are mediators between nature and idea.

— Johann Wolfgang von Goethe

“The mind likes a strange idea as little as the body likes a strange protein and resists it with similar energy. It would not…

— Wilfred Trotter

If we take an unprejudiced view of the processes of consciousness, free from all the so-called association rules and theories, we see at once…

— Wilhelm Wundt

To have an idea of a thing is not just to get certain sensations from it. It is to be able to respond to…

— John Dewey

Once the subconscious mind accepts an idea, it begins to execute it.

— Joseph Murphy

The human mind treats a new idea the same way the body treats a strange protein; it rejects it.

— Anonymous