Everyone steals in commerce and industry. I've stolen a lot, myself. But I know how to steal! They don't know how to steal! - Thomas Edison

I am not discouraged, because every wrong attempt discarded is another step forward.

The doctor of the future will give no medicine, but will instruct his patient in the care of the human frame, in diet and in the cause and prevention of disease.

I never did anything worth doing by accident, nor did any of my inventions come indirectly through accident, except the phonograph. No, when I have, fully decided that a result is worth getting, I go about it, and make trial after trial, until it comes.