Don't be afraid to stumble. Any inventor will tell you that you don't follow a plan far before you strike a snag. If, out of 100 ideas you get one that works, it's enough.
Charles KetteringAction without intelligence is a form of insanity, but intelligence without action is the greatest form of stupidity in the world.
Charles KetteringWe have a lot of people revolutionizing the world because they've never had to present a working model.
Charles Kettering