Reality is merely an illusion, albeit a very persistent one.

Imagination is everything. It is the preview of life's coming attractions.

Logic will get you from A to B. Imagination will take you everywhere.

Peace cannot be kept by force. It can only be achieved by understanding.

The true sign of intelligence is not knowledge but imagination.

Great ideas often receive violent opposition from mediocre minds.

We cannot solve our problems with the same thinking we used when we created them.

In the middle of every difficulty lies opportunity.

Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either.

If you can't explain it simply, you don't understand it well enough.

Setting an example is not the main means of influencing another, it is the only means.

There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.