Knighterrantry is a most chuckleheaded trade, and it is tedious hard work, too, but I begin to see that there is money in it, after all, if you have luck. Not that I would ever engage in it, as a business, for I wouldn't. No sound and legitimate business can be established on a basis of speculation. A successful whirl in the knighterrantry line--now what is it when you blow away the nonsense and come down to the cold facts? It's just a corner in pork, that's all.
Mark TwainEvery improvement that is put upon the real estate is the result of an idea in somebody's head. The skyscraper is another idea; the railroad is another; the telephone and all those things are merely symbols which represent ideas. An andiron, a wash-tub, is the result of an idea that did not exist before.
Mark Twain