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.

Imagination without deep and full knowledge is a snare.

Reality leaves a lot to the imagination.