Is it normal that looking at the mirror gives me a strong reality check?

I live in my head, zoned out, day dreaming for majority of my life. I also believe I have some common mental illusions -- from ego to not grasping the seriousness of some parts of life. But whenever I look at myself in the mirror, all those subconscious delusions shatter, and I am brought back to reality, and in the moment.

If that's confusing to understand, have you read/seen Divergent. During a couple tests that the girl went through she figures out, "This isn't real" and right before she realizes that there was always often a reflection of herself -- I strongly identified with that.

IIN?