“Living in dreams of yesterday, we find ourselves still dreaming of impossible future conquests.”

“One cannot and must not try to erase the past merely because it does not fit the present.”

“One fails forward toward success.”

“America had often been discovered before Columbus, but it had always been hushed up.”

“Obstacles are things a person sees when he takes his eyes off his goal.”

“I’ve never known any trouble than an hour’s reading didn’t assuage.”

“The end of labor is to gain leisure.”

“What happens is not as important as how you react to what happens.”

“I just invent, then wait until man comes around to needing what I’ve invented.”

“Between saying and doing, many a pair of shoes is worn out.”