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.

Imagination is the beginning of creation. You imagine what you desire, you will what you imagine and at last you create what you will.

Imagination is more important than knowledge.

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.

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

To invent, you need a good imagination and a pile of junk.