To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Imagination is more important than knowledge.

The true sign of intelligence is not knowledge but imagination.

The limit of man's knowledge in any subject possesses a high interest which is perhaps increased by its close neighbourhood to the realms of imagination.

Why does the eye see a thing more clearly in dreams than the imagination when awake?