Sometimes I read my old HN comments (I only comment here) and get a lot of insights. Subjects where my thoughts changed, subjects where my thoughts are still the same, my strenghts, my weaknesses, etc.
I wonder if there is any tool to facilitate this.
You need to be in dialogue with someone else (about yourself) to assess and improve yourself. The mind is designed more to look outward than inward. So it can start developing and then reinforcing all manner of misunderstandings, when confronted by its own limitations.