Letters 26.9

The meaning is clear,—that it is a wonderful thing to learn thoroughly how to die. You may deem it superfluous to learn a text that can be used only once; but that is just the reason why we ought to think on a thing. When we can never prove whether we really know a thing, we must always be learning it.

Seneca, Letters to Lucilius 26.9, translated by Richard Mott Gummere