Seneca · On the intimations of our immortality
Letters 102.5
All these things have a view to conduct, and therefore they have been inserted under the proper topic. But the remarks of dialecticians in opposition to this idea had to be sifted out, and were accordingly laid aside. Now that you demand an answer to them all, I shall examine all their statements, and then refute them singly.
Seneca, Letters to Lucilius 102.5, translated by Richard Mott Gummere