Why is it so hard to tolerate ambiguity in relationships, and how do therapists help clients manage this discomfort?

What are some surprising signs of physical illness that might be mistaken for mental health issues, like anxiety or hallucinations?
Why do some parents make excuses instead of apologizing when reconnecting with their children after a long absence? How should you respond?
Why do INFJs often feel torn between their dream world and reality, while INFPs seem content in their own imaginative space?