The principal, the only, thing a man makes, is his condition of fate. Though commonly he does not know it, nor put up a sign to this effect, "My own destiny made and mended here." (Not yours.) He is a master workman in the business. He works twenty-four hours a day at it, and gets it done. Whatever else he neglects or botches, no man was ever known to neglect this work. A great many pretend to make shoes chiefly, and would scout the idea that they make the hard times which they experience.
Henry David ThoreauSome circumstantial evidence is very strong, as when you find a trout in the milk.
Henry David ThoreauThe humblest observer who goes to the mines sees and says that gold-digging is of the character of a lottery; the gold thus obtained is not the same thing with the wages of honest toil. But, practically, he forgets what he has seen, for he has seen only the fact, not the principle, and goes into trade there, that is, buys a ticket in what commonly proves another lottery, where the fact is not so obvious.
Henry David Thoreau