Don’t. Stop while you are ahead.
It was some buzzword that TFU came up with and pushed so they could blame their paying customers for “failing” as they would call it.
It is a complete misunderstanding of what the journey is. You should be actively looking for ways to better yourself and further your journey. You should not be doing this by blaming yourself.
The mirror exercise is nonsense. It is not helpful for your path to union. It is destructive and controlling. Do not do it.