This I know; the spirit of Man cannot be stopped.

A scientist who cannot prove what he has accomplished, has accomplished nothing.

The ultimate aim of all science to penetrate the unknown. Do you realize we know less about the earth we live on than about the stars and the galaxies of outer space? The greatest mystery is right here, right under our feet.

Don't you see what's at stake here? The ultimate aim of all science to penetrate the unknown. Do you realize we know less about the earth we live on than about the stars and the galaxies of outer space? The greatest mystery is right here, right under our feet.

I don't sleep. I hate those little slices of death.

Tired minds don't plan well. Sleep first, plan later.