I realized, 'Yo, I can't do anything in moderation. I don't know how.

I don't know anything about music. In my line you don't have to.

We still do not know one thousandth of one percent of what nature has revealed to us.

From his neck down a man is worth a couple of dollars a day, from his neck up he is worth anything that his brain can produce.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

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