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.

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.

The true sign of intelligence is not knowledge but imagination.

Knowledge is a tangible asset, quite often the most important tool in your work.

The most important knowledge is that which guides the way you lead your life.

What is important is not the quantity of your knowledge but its quality. You can know many things without knowing the most important.