Book XI · 3
What a soul that is which is ready, if at any moment it must be separated from the body, and ready either to be extinguished or dispersed or continue to exist; but so that this readiness comes from a man's own judgment, not from mere obstinacy, as with the Christians, but considerately and with dignity and in a way to persuade another, without tragic show.
Marcus Aurelius, Meditations XI.3. Translated by George Long (1862). The Stoic Library.