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 KetteringAll human development, no matter what form it takes, must be outside the rules; otherwise we would never have anything new.
Charles KetteringI often say that research is a way of finding out what you are going to do when you can't keep on doing what you are doing now.
Charles Kettering