Karsten Runquist’s review published on Letterboxd :
What makes a life a life? The people who raised you? The places you went? The home you grew up in? The historical events that occurred? The relationships you had? The deaths you witnessed? The philosophies you learned? This film is saying these are all correct, focusing on the idea that life is based off memory. Which then poses the question, is life only based off memory? Is what you didn't remember not considered a part of your life? Told with a visual style that had me literally pausing the film to take it all in, Mirror introduced me to a life so distant from my own but through a lens that felt so familiar. It's silly to think I or anyone is going to figure out the purpose and meaning behind life, but if there's anyone that'll make you feel like you're a little bit closer to figuring it out, it's Andrei Tarkovsky.