Genius is one percent inspiration, ninety-nine percent perspiration.
If we did all the things we are capable of doing, we would literally astound ourselves.
During all those years of experimentation and research, I never once made a discovery. All my work was deductive, and the results I achieved were those of invention, pure and simple.
Everything comes to him who hustles while he waits.
Opportunity is missed by most people because it is dressed in overalls and looks like work.
Restlessness is discontent — and discontent is the first necessity of progress.
Show me a thoroughly satisfied man — and I will show you a failure.