A demonic notebook written in with demonic ink, in the laboratory of The Master;
The human mind and the demonic mind are the most similar in their construction, with the angelic mind being the most deviated. This is makes sense, because of how they each came into existence. I am unsure how the clarifying effects of the mirror will effect an angel. On a human it is very straightforward- they will immediately be able to see all flaws, nearly to the extent of all else. Their mind will also become clarified, and they should have a markedly higher intellect afterwards. The effect on an angel however... oh I wish I had one to test! Still, it should produce interesting results, should the plan come to fruition.
In the end, chaos always benefits the demon.