Continued innovation is the best way to beat the competition.

I make more mistakes than anyone else I know, and sooner or later, I patent most of them.

I have always consistently opposed high-tension and alternating systems of electric lighting...not only on account of danger, but because of their general unreliability and unsuitability for any general system of distribution.

An average American loves his family. If he has any love left over for some other person, he generally selects Mark Twain.

There is always a better way.

Show me a completely contented person and I'll show you a failure.

I am much less interested in what is called God's word than in God's deeds. All bibles are man-made.