Letter 82 — On the Natural Fear of Death (§5)

“Therefore, gird yourself about with philosophy, an impregnable wall. Though it be assaulted by many engines, Fortune can find no passage into it. The soul stands on unassailable ground, if it has abandoned external things; it is independent in its own fortress; and every weapon that is hurled falls short of the mark. Fortune has not the long reach with which we credit her; she can seize none except him that clings to her.”