A man is rich in proportion to the number of things he can afford to let alone.
Source: Walden, Where I Lived, and What I Lived For, 1854.
-- 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.