Let me say again Adrastus thank you for posting that reference to Metrodorus and recommend to others that this is a great way of helping out on the forum.
We have many people (including me) who have limited reading experience in the secondary literature, especially people like Seneca or Cicero or Plutarch or Marcus Aurelius etc., who will regularly mix references to Epicureans into their standard fare of Stoicism or other viewpoints.
It helps everyone if those who are more fluent in the less-known sources will point out parallels such as Adrastus did here.
We really ought to have a section on "Writings/Sayings of Metrodorus" so that citations like this can be collected in one place.