Dark resistance and memory.
The trick dark resistance plays on us is that it makes us forget the best versions of ourselves. Not only that, it makes us believe that the best versions of ourselves is not us, it's someone else.
If we start embracing the fact that our best version is no one but us, we can start loosening the grip dark resistance has on us. People who remind us of our best version help us overcome this enormous challenge.
Also, it's a gift to be a person like that, who reminds people of their best version. We may not realise who we are helping come out of dark resistance.