I like this post a lot. It's applicable to non-mentally-ill people, as well, since strong emotional responses are often dismissed and denigrated. "You're being irrational" is usually a criticism and a dismissal. Many of us have internalized this, too. On the relationship-advice communities I read, people will often describe a situation that prompted strong emotions in them, and then ask, "Am I being irrational?" meaning "Should I not be feeling this way?" No, no, no, no, no. All emotions are irrational, but that doesn't mean they're wrong!