The course of things in the world is ever the same; a continual rotation; up and down, from age to age. Either the Universal Mind exerts itself in every particular event, in which case you must accept what comes immediately from it: or it has exerted itself once and for all, and, as a result, all things go on for ever, in a necessary chain of consequence: or again atoms and indivisible particles are the origin of all things. In fine, if there be a God, all is well; and if there be only chance, you at least need not act by chance. The earth will presently cover us all; and then this earth will itself be changed into other forms, and these again into others, and so on without end. And, if any one considers how swiftly those changes and transmutations roll on, like one wave upon another, he will despise all things mortal.