It’s an interesting situation. While for some people it’s possible to ‘simply’ reframe one’s outlook toward something more positive, if the thoughts weighing him down are deeply felt existential or empathetic melancholy there can sometimes be a sense of duty in remaining in that state. A comfort in being sad, to paraphrase Kurt Cobain. Forcing yourself to look past your troubles can at times feel like shallowness, or artifice. It’s not a great state to be in if you’re a public facing employee, though.