The trouble with most people is that they quit before they start.

The biggest failure of man is that he gives up before he realizes how close he was to success.

For faith, as well intentioned as it may be, must be built on facts, not fiction - faith in fiction is a damnable false hope.

I am quite correctly described as 'more of a sponge than an inventor....'

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

I find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.

I know of over 3,000 ways [that] a light bulb does not work.