Because I readily absorb ideas from every source - frequently starting where the last person left off - I never pick up an item without thinking of how I might improve it.

Time is really the only capital that any human being has, and the only thing he can't afford to lose.

I've never made a mistake. I've only learned from experience.

I try not to invent things that people don't need.

Friendship is the heaven of life.

Fooling around with alternating currents is just a waste of time. Nobody will use it, ever. It's too dangerous . . . it could kill a man as quick as a bolt of lightning. Direct current is safe.

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