Accomplishing something provides the only real satisfaction in life.

Seeming to do is not doing.

I am long on ideas, but short on time. I expect to live to be only about a hundred.

I never perfected an invention that I did not think about in terms of the service it might give others... I find out what the world needs, then I proceed to invent.

None of my inventions came by accident. I see a worthwhile need to be met and I make trial after trial until it comes. What it boils down to is one per cent inspiration and ninety-nine per cent perspiration.

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.

Every wrong attempt discarded is another step forward