Logic will get you from A to Z, imagination will get you everywhere.

Imagine the end desired and feel its reality. Follow it through, and you will get definite results.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Reality leaves a lot to the imagination.

Where there is shouting, there is no true knowledge.

I've had quite a lot of luck with dreams. I've often awoken in the night with a phrase or even a whole song in my head.

Give me two hours a day of activity, and I'll take the other twenty-two in dreams.

I have been impressed with the urgency of doing. Knowing is not enough, we must apply. Being willing is not enough, we must do.

The noblest pleasure is the joy of understanding.