He had discovered a great law of human action, without knowing it-namely, that in order to make a man or a boy covet a thing, it is only necessary to make the thing difficult to attain. - Tom Sawyer, by Mark Twain.

There! there is happiness; heaven in a teaspoon; happiness, with all its intoxication, all its folly, all its childishness. You can swallow it without fear; it is not fatal... You are now sufficiently provisioned for a long and strange journey; the steamer has whistled, the sails are trimmed; and you have this curious advantage over ordinary travellers, that you have no idea where you are going. You have made your choice; here's to luck! - The Poem of Hashish, by Charles Baudelaire