“Those then who know not wisdom and virtue, and are always busy with gluttony and sensuality, go down and up again as far as the mean; and in this region they move at random throughout life, but they never pass into the true upper world; thither they neither look, nor do they ever find their way, neither are they truly filled with true being, nor do they taste of pure and abiding pleasure. Like cattle, with their eyes always looking down and their heads stooping to the earth, that is, to the dining-table, they fatten and feed and breed, and, in their excessive love of these delights, they kick and butt at one another with horns and hoofs which are made of iron; and they kill one another by reason of their insatiable lust. For they fill themselves with that which is not substantial, and the part of themselves which they fill is also unsubstantial and incontinent.” (Plato and Benjamin Jowett, The Republic)