There are, as is known, insects that die in the moment of fertilization. So it is with all joy: life's highest, most splendid moment of enjoyment is accompanied by death.
Concepts, like individuals, have their histories and are just as incapable of withstanding the ravages of time as are individuals. But in and through all this they retain a kind of homesickness for the scenes of their childhood.
Listen to the cry of a woman in labor at the hour of giving birth - look at the dying man's struggle at his last extremity, and then tell me whether something that begins and ends thus could be intended for enjoyment.
Old age realizes the dreams of youth: look at Dean Swift; in his youth he built an asylum for the insane, in his old age he was himself an inmate.