I was at the foot of my class.

Show me a completely contented person and I'll show you a failure.

Nobody knows whether our personalities pass on to another existence or sphere, but if we can evolve an instrument so delicate to be manipulated by our personality as it survives in the next life such an instrument ought to record something.

The inventor can't do it all, you've got to change people. We have an enormous capacity to invent super-machinery. But our desire to install the device is weak. Human inertia is the problem, not invention. Something in man makes him resist change.

An idea is something that won't work unless you do.

Inspiration can be found in a pile of junk. Sometimes, you can put it together with a good imagination and invent something.

From his neck down a man is worth a couple of dollars a day, from his neck up he is worth anything that his brain can produce.