What men call social virtues, good fellowship, is commonly but the virtue of pigs in a litter, which lie close together to keep each other warm.
Source: Journals, 23 Oct 1852.
-- Henry David Thoreau, (Jul 12 1817-1862), US essayist, poet, naturalist; He is best known for his description of life at Walden Pond, Walden, 1854 and his essay Civil Disobedience, 1849.