Thank you for subscribing to Annotated Thomist...check back each day for a new section of St. Thomas' corpus, annotated and summarized. (FREE TRIAL FOR NEW SUBSCRIBERS!!!)
If you need more personalized help reading the Summa, I am available for 1-on-1 sessions, here.
In this article, St. Thomas distinguishes between three kinds of evil, i.e., 1. Sin, 2. Punishment, 3. Natural Corruption.