M is for Mirror of Erised
“It shows us nothing more or less than the deepest, most desperate desire of our hearts.”
The Mirror of Erised chapter within Harry Potter and the Philosopher's Stone is perhaps one of the most heartbreaking of all. With the mirror displaying what it is that you utmost desire, it is heartbreaking to watch Harry return to the mirror every night in order to finally be with his parents. Dumbledore wisely shares that many have wasted away before the mirror, something which forces Harry to reconsider what he is doing. A powerful mirror and something that I am glad does not exist in the Muggle world ;).
More information on the Mirror of Erised here.