“One may say the eternal mystery of the world is its comprehensibility.”

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

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

A man should look for what is, and not for what he thinks should be.

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

I have no special talent. I am only passionately curious.

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

If A is success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut.

In the middle of every difficulty lies opportunity.