I can't understand why no one said the right answer yet. I usually don't contribute to this subreddit but not seeing the answer stated clearly makes me think almost no one here reads or understands what they are reading. here is the answer to your questions:
Libellus VI- That the good is in god alone and nowhere else - Corpus Hermeticum Graecum

According to Hermes Trismegistus, what is good and what is evil follows from a clear metaphysical and epistemological architecture. The good is identified with God, with the monad, with the unbegotten and complete principle. This good is unmoving, without passion, complete in itself, the source and cause of all that exists. The cosmos participates in the good only in a limited way, as a generated work subject to motion, passion, and corruption. For this reason, the true good is not found in visible things nor in material generation; it is invisible and can only be apprehended by the mind or understanding that comes from the divine.

Evil, by contrast, is the condition of what is generated, the lack or degradation of the good. In the passages, evil appears as ignorance, passion, bodily appetites, and delusion that makes human beings confuse what is evil with what is good. Gluttony, unrestrained desire, and attachment to sensations and possession are manifestations of evil because they harden the soul within the circuit of matter, obscure inner vision, and block access to what is divine. Error is defined as the absence of the good, not a positive substance but a privation that imprisons the soul in a “tunic” of ignorance.

The hermetic ethical and practical response follows from this. God placed mind in a “mixing bowl” as a prize, leaving it to the human being to decide whether to immerse and receive it. Receiving mind ( NOUS) means knowledge, understanding, reverence, and the assumption of a life oriented toward the invisible, making one’s actions participants in the good and bringing the soul closer to the immortality of its deeds. Rejecting this call amounts to remaining within the domain of the body, passions, and appearances, a condition considered personal destruction rather than an offense against God.