49 There is, then, nothing for us to fear in death, nothing for us to mourn, whether life which was received from nature be rendered up to her again, or whether it be sacrificed to some duty which claims it, and this will be either an act of religion or the exercise of some virtue. And no one ever wished to remain as at present. This has been supposed to have been promised to John, but it is not the truth. We hold fast to the words, and deduce the meaning from them. He himself in his own writing denies that there was a promise that he should not die, that no one from that instance might yield to an empty hope. But if to wish for this would be an extravagant hope, how much more extravagant were it to grieve without rule for what has happened according to rule!
Source: On the Death of Satyrus (New Advent)