What things do Stoics consider good and bad?
Only virtue is always good, and only the lack of virtue is always bad. We do not believe there is any evil in Nature, only in the behavior of human beings, and that comes about when people deliberately choose what is harmful to themselves. You see, we don’t believe anyone can harm you, only that you can harm yourself when you choose not to live according to Nature. But we don’t condemn others for lacking virtue, because they are already punishing themselves by their behavior. No one can hurt me, because I alone am responsible for the nobility of my character–and that is the Stoic’s highest ideal, the noble character. Rich men and women are a dime a dozen, but a noble character is rare and the greatest of all. Stoicism teaches you how to build a noble character.
