As for doing good; that is one of the professions which is full. Moreover I have tried it fairly and, strange as it may seem, am satisfied that it does not agree with my constitution.
Source: Walden, Economy, 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.