We say justly that the weak person is flat, for, like all flat substances, he does not stand in the direction of his strength, that is, on his edge, but affords a convenient surface to put upon. He slides all the way through life.... But the brave man is a perfect sphere, which cannot fall on its flat side and is equally strong every way.
Henry David ThoreauAs in geology, so in social institutions, we may discover the causes of all past changes in the present invariable order of society.
Henry David Thoreau