When there's no experimenting there's no progress. Stop experimenting and you go backward. If anything goes wrong, experiment until you get to the very bottom of the trouble.
Two per cent. is genius, and ninety-eight per cent. is hard work.
This problem, once solved, will be simple.
I am proud of the fact that I never invented weapons to kill.
The chief function of the body is to carry the brain around.
Youth doesn't take advice.