I don't remember hearing about mirror work before. Of course the universe is filled with things I've never heard of so that's nothing new. Here's Mateo Sol's introduction...

Mirror work is strangely confronting, undeniably intimidating, a little embarrassing … but also profoundly healing.

Of all the inner work practices available to us in the 21st century, mirror work is one of the simplest and most powerful.

No, you don’t have to go out and splurge money on loads of spiritual or self-help paraphernalia (thank god) – all you need to do mirror work is a mirror – that’s it! And nearly all of us already have access to one.

If you’re looking for a new psychological or spiritual tool to add to your repertoire, look no further than your bathroom mirror.

What is Mirror Work?

Mirror Work was a method originally developed by inspirational teacher Louise Hay as a way of getting in touch with the inner self. The primary purpose of mirror work is to develop self-love, self-care, and a more meaningful relationship with others. By simply looking into the mirror for a certain amount of time each day and gently talking to yourself, you can foster a more compassionate and forgiving connection with yourself.
How to Practice Mirror Work (Step-By-Step Guide) — by Mateo Sol

https://lonerwolf.com/mirror-work-guide/