“So long as governments set the example of killing their enemies, private individuals will occasionally kill theirs.”

“The great man is not so great as folks think, and the dull man is not quite so stupid as he seems. The difference in our estimates of men lies in the fact that one individual is able to get his goods into the show-window, and the other is not aware that he has any show-window or any goods.”

“Opportunities for education should be within the reach of every individual, not for the lucky few.”

“Never explain―your friends do not need it and your enemies will not believe you anyway.”

“The line between failure and success is so fine. . . that we are often on the line and do not know it.”

“No man needs a vacation so much as the man who has just had one.”

“The world is moving so fast these days that the man who says it can't be done is generally interrupted by someone doing it.”