"It's important for a hero to recognize and acknowledge these figures as Threshold Guardians. In daily life, you have probably encountered resistance when you try to make a positive change in your life. People around you, even those who love you, are often reluctant to see you change. They are used to your neuroses and have found ways to benefit from them. The idea of your changing may threaten them. If they resist you, it's important to realize they are simply functioning as Threshold Guardians, testing you to see if you are really resolved to change." - The Writer's Journey, 2nd Edition, Christopher Vogler.
Do you know a Threshold Guardian in your life? Have you, in fact, been a Threshold Guardian to others?
I've been both, but I'm constantly working to make sure that not only do I continue my hero quest, but also be a mentor to others. (If you're confused, read the book)