We will make electricity so cheap that only the rich will burn candles.

A good idea is never lost. Even though its originator or possessor may die without publicizing it, it will someday be reborn in the mind of another....

Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

Whatever the mind of man creates, should be controlled by man's character.

What you are will show in what you do.

A good intention, with a bad approach, often leads to a poor result.

When I have fully decided that a result is worth getting I go ahead of it and make trial after trial until it comes.

All bibles are man-made.

When you have exhausted all possibilities, remember this - you haven't.