"Remember, nothing that's good works by itself, just to please you. You have to make the damn thing work."

"Hell, there are no rules here--we're trying to accomplish something."

"If I find 10,000 ways something won't work, I haven't failed. I am not discouraged, because every wrong attempt discarded is another step forward."

"All Bibles are man-made."

"To invent, you need a good imagination and a pile of junk."

"A genius is just a talented person who does his homework."

"Every person has free choice. Free to obey or disobey the Natural Laws. Your choice determines the consequences. Nobody ever did, or ever will, escape the consequences of his choices."

"The crux... is that the vast majority of the mass of the universe seems to be missing."

"One of the simple but genuine pleasures in life is getting up in the morning and hurrying to a mousetrap you set the night before."

"That's one small step for [a] man, one giant leap for mankind."

"The impossible is often the untried."

"To be pleased with one's limits is a wretched state."