Commentary on Meditations: B8:25

Lucilla buried Verus, then Lucilla was buried. Secunda buried Maximus, then Secunda next. So with Epitynchanus and Diotimus, Antoninus and Faustina. The same story always. Celer saw Hadrian to his grave, then went to his own grave. Where are they now, those sharp minds, those prophets or prigs? Certainly Charax, Demetrius, Eudaemon, and others like them were sharp minds. But all creatures of a day, long dead. Some not remembered even briefly, some turned into legend, and some now vanishing even from legend. So remember this, that either the poor compound of your body must be scattered, or your frail spirit must be extinguished, or else migrate and take its post elsewhere.

All die.  Even the famous people of today, with passage of time, will be long forgotten.  The great flow of time and space ensures all pass into obscurity.