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

The important thing is not to stop questioning. Curiosity has its own reason for existing.

God does not play dice with the universe.

Disneyland will never be completed. It will continue to grow as long as there is imagination left in the world.

-- Walt Disney

Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1.

-- Warren Buffett

An expert is a man who has made all the mistakes which can be made, in a narrow field.

-- Niels Bohr

A new scientific truth does not triumph by convincing its opponents, but rather because its opponents eventually die and a new generation grows up familiar with it.

-- Max Planck

Finally we shall place the Sun himself at the center of the Universe.

-- Nicolaus Copernicus

The present is theirs; the future, for which I really worked, is mine.

-- Nikola Tesla