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

Show me a thoroughly satisfied man and I will show you a failure.

It’s obvious that we don’t know one-millionth of one per cent about anything.

There are no rules here, we’re trying to accomplish something.

I didn’t fail 1000 times. The light bulb was an invention with 1000 steps.

A man’s best friend is a good wife.

I am proud of the fact that I never invented weapons to kill.

What a man’s mind can create, man’s character should control.

Vision without execution is a hallucination.

Everything comes to him who hustles while he waits.

The best thinking has been done in solitude. The worst has been done in turmoil.

Opportunity is missed by most people because it is dressed in overalls and looks like work.

Discontent is the first necessity of progress.

To my mind the old masters are not art; their value is in their scarcity.

I start where the last man left off.

The value of an idea lies in the using of it.

We often miss opportunity because it’s dressed in overalls and looks like work.

I don’t live with the past; I am living for today and tomorrow.

There’s a way to do it better - find it.