Imagination is more important than knowledge.

The true sign of intelligence is not knowledge but imagination.

Imagination governs the world.

Imagination without deep and full knowledge is a snare.

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.

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