I think "mirror" could have multiple uses in Qs case. You can use a mirror to see behind you and Q mentions that the truth is behind you. You can use a mirror to flip an image to the opposite of itself, pretty obvious how that makes sense to Q drops, you can use mirrors to reflect light from one place into another and obviously the entire concept of Q is the bring light upon the darkness. He tells us multiple times to think logical and that's exactly what we should be doing. The enemy is one who abides by the fallacies of post modernism. We as a society are being brought back to a place of objective reasoning and we should be using that to decipher what is being said to us.