Letters from a Stoic 91 : 12
They stand but to fall! This doom awaits them, one and all; it may be that some internal force, and blasts of violence which are tremendous because their way is blocked, will throw off the weight which holds then down; or that a whirlpool of raging currents, mightier because they are hidden in the bosom of the earth, will break through that which resists its power; or that the vehemence of flames will burst asunder the framework of the earth's crust; or that time, from which nothing is safe, will reduce them little by little; or that a pestilential climate will drive their inhabitants away and the mould will corrode their deserted walls. It would be tedious to recount all the ways by which fate may come; but this one thing I know: all the works of mortal man have been doomed to mortality, and in the midst of things which have been destined to die, we live!