Men have a singular desire to be good without being good for anything, because, perchance, they think vaguely that so it will be good for them in the end.
 Henry David Thoreau, A Week on the Concord and Merrimack Rivers (1849). copy citation

Context

“The New Testament may be a choice book to him on some, but not on all or most of his days. He will rather go a-fishing in his leisure hours. The Apostles, though they were fishers too, were of the solemn race of sea-fishers, and never trolled for pickerel on inland streams. Men have a singular desire to be good without being good for anything, because, perchance, they think vaguely that so it will be good for them in the end. The sort of morality which the priests inculcate is a very subtle policy, far finer than the politicians, and the world is very successfully ruled by them as the policemen. It is not worth the while to let our imperfections disturb us always.” source