Lifespans, by the sages' estimation, and the biographical detail that we are lucky enough to happen upon, now and again, in the Talmud. Plus, the encounters of various sages with the Angel of Death. Also, the process of honoring the deceased. Plus, the future of death (or absence of a future for death, in the time of redemption). Also, the comforting by the sages of R. Yishmael, when his son's died. And at this "shiva visit," Rabbi Akiva spoke last, and from personal experience. Plus, the need for empathy, and the connection the mourning Jerusalem and the Temple.