Of things, some are in our power, and others are not.
In our power are opinion, movement toward a thing, desire, aversion — whatever are our own acts. Not in our power are the body, property, reputation, office.
You say he told you your work was worthless. That is two things, and you have folded them into one. Words were spoken — that is the event. Worthless, harmed, diminished — that is the verdict you added. Epictetus asks only for the seam between them. Find it, and see which half was ever yours.
On the ground of Enchiridion 5 — men are disturbed not by things, but by their opinions about things.
Now bring one of your own. What appeared to you today?