I am thankful for the difficult people in my life They have shown me exactly who I don’t want to be

What the hec does that mean? It mean you have an option to be like them or not to be like them! well that confused me even more. Well how about it mean that the difficult people to work with are the people that will show the real you, that you don’t want to be. Well I still don’t get it! OK how about Listen to What I say but Don’t do what I’ve done or did or will do :)! Hec now I’m lost! 🙂