Letters 120.4

Nature could not teach us this directly; she has given us the seeds of knowledge, but not knowledge itself. Some say that we merely happened upon this knowledge; but it is unbelievable that a vision of virtue could have presented itself to anyone by mere chance. We believe that it is inference due to observation, a comparison of events that have occurred frequently; our school of philosophy hold that the honourable and the good have been comprehended by analogy. Since the word “analogy” has been admitted to citizen rank by Latin scholars, I do not think that it ought to be condemned, but I do think it should be brought into the citizenship which it can justly claim. I shall, therefore, make use of the word, not merely as admitted, but as established.

Now what this “analogy” is, I shall explain.

Seneca, Letters to Lucilius 120.4, translated by Richard Mott Gummere