The Test Of All Knowledge Is Experiment.

But See That The Imagination Of Nature Is Far, Far Greater Than The Imagination Of Man.

You Can Recognize Truth By Its Beauty And Simplicity. When You Get It Right, It Is Obvious That It Is Right -- At Least If You Have Any Experience -- Because Usually What Happens Is That More Comes Out Than Goes In.

All We Know So Far Is What Doesn't Work.

You See, I Get Such Fun Out Of Thinking That I Don't Want To Destroy This Most Pleasant Machine That Makes Life Such A Big Kick.

Science Is Of Value Because It Can Produce Something.