One of the first and most clearly recognised rules to be observed is that happiness is most likely to be attained when it is not the direct object of pursuit. In early youth we are accustomed to divide life broadly into work and play, regarding the first as duty or necessity and the second as pleasure. One of the great differences between childhood and manhood is that we come to like our work more than our play. It becomes to us, if not the chief pleasure, at least the chief interest of our lives, and even when it is not this, an essential condition of our happiness. Few lives produce so little happiness as those that are aimless and unoccupied. Apart from all considerations of right and wrong, one of the first conditions of a happy life is that it should be a full and busy one, directed to the attainment of aims outside ourselves. Anxiety and Ennui are the Scylla and Charybdis on which the bark of human happiness is most commonly wrecked. If a life of luxurious idleness and selfish ease in some measure saves men from the first danger, it seldom fails to bring with it the second. No change of scene, no multiplicity of selfish pleasures will in the long run enable them to escape it. As Carlyle says, 'The restless, gnawing ennui which, like a dark, dim, ocean flood, communicating with the Phlegethons and Stygian deeps, begirdles every human life so guided--is it not the painful cry even of that imprisoned heroism?... You ask for happiness. "Oh give me happiness," and they hand you ever new varieties of covering for the skin, ever new kinds of supply for the digestive apparatus.... Well, rejoice in your upholsteries and cookeries if so be they will make you "happy." Let the varieties of them be continual and innumerable. In all things let perpetual change, if that is a perpetual blessing to you, be your portion instead of mine. Incur the prophet's curse and in all things in this sublunary world "make yourselves like unto a wheel." Mount into your railways; whirl from place to place at the rate of fifty or, if you like, of five hundred miles an hour; you cannot escape from that inexorable, all-encircling ocean moan of ennui. No; if you could mount to the stars and do yacht voyages under the belts of Jupiter or stalk deer on the ring of Saturn it would still begirdle you. You cannot escape from it; you can but change your place in it without solacement except one moment's. That prophetic Sermon from the Deeps will continue with you till you wisely interpret it and do it or else till the Crack of Doom swallow it and you.'[6]