A scientist who cannot prove what he has accomplished, has accomplished nothing. Walter Reisch More Quotes by Walter Reisch More Quotes From Walter Reisch Tired minds don't plan well. Sleep first, plan later. Walter Reisch tired mind sleep This I know; the spirit of Man cannot be stopped. Walter Reisch spirit knows men Why does man freeze to death trying to reach the North Pole? Why does man drive himself to suffer the steam and heat of the Amazon? Why does he stagger his mind with the mathematics of the sky? Once the question mark has arisen in the human brain the answer must be found, if it takes a hundred years. A thousand years. Walter Reisch sky men years 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. Walter Reisch space stars feet The ultimate aim of all science is to penetrate the unknown. Walter Reisch penetrate aim ultimate I don't sleep. I hate those little slices of death. Walter Reisch hate sleep littles There's no term to the work of a scientist. Walter Reisch scientist term