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

Everything you can imagine is real.

One can have no smaller or greater mastery than mastery of oneself.

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.

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.