All human development, no matter what form it takes, must be outside the rules; otherwise we would never have anything new.

The typical eye sees the ten per cent bad of an idea and overlooks the ninety per cent good.

The world hates change, yet it is the only thing that has brought progress.

The opportunities of man are limited only by his imagination. But so few have imagination that there are ten thousand fiddlers to one composer.

We are just in the kindergarten of uncovering things; there is no downcurve in science.

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.

There has never been any 30-hour week for men who had anything to do.