I know of over 3,000 ways [that] a light bulb does not work.

A failure teaches you that something can't be done-that way.

Maturity is often more absurd than youth and very frequently is most unjust to youth.

Just because something doesn't do what you planned it to do doesn't mean it's useless.

In creating technology for ourselves we created it for the world.

Even though I am nearly deaf, I seem to be gifted with a kind of inner hearing which enables me to detect sounds and noises which the ordinary person does not hear.

Success is the product of the severest kind of mental and physical application.