There is no limit to which a man will not go to avoid thinking.

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.

I get my ideas from listening from within.

I have not failed. I've just found 10,000 foundations and individual donors whose priorities don't align with my organization's.

If I had not had so much ambition and not tried to do so many things, I probably would have been happier, but less useful.

Nothing that's good works by itself, you've got to make the damn thing work.

The doctor of the future will no longer treat the human frame with drugs, but rather will cure and prevent disease with nutrition.