I don't speak Spanish, I speak a little of Italian but no Spanish.

I don't want people to say, 'Something is true because Tyson says it is true.' That's not critical thinking.

The eternal silence of these infinite spaces frightens me.

We may consider each generation as a distinct nation, with a right, by the will of its majority, to bind themselves, but none to bind the succeeding generation, more than the inhabitants of another country.

I shall never believe that God plays dice with the world.