We should distrust any enterprise that requires new clothes. – Henry David Thoreau, Walden

The reputations of the nineteenth century will one day be quoted to prove its barbarism. – Ralph Waldo Emerson, “Uses of Great Men” (lecture)

We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But there are tens of thousands of years in the future. Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on. – Richard P. Feynman

Civilization is a limitless multiplication of unnecessary necessaries. – Mark Twain, quoted in More Maxims of Mark compiled by Merle Johnson, 1927