Imagination is more important than knowledge.

The true sign of intelligence is not knowledge but imagination.

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.

Reality leaves a lot to the imagination.

Great ideas originate in the muscles.