The Mirror of Erised
Dumbledore woke up to find a small pile of presents at the foot of his bed. The house elves must have worked very hard to dispense all the presents so quickly. For one foolish second he thought that have should give them a raise. Well, he thought I should at least complement them. They are so very eager to please.
He looked through the pile of gifts. Books mostly. He sighed. When would people realize that just because he was headmaster, he didn't necessarily spend his every waking moment reading? And anyway, he already owned half the books he got every Christmas. Oh well, it was the thought that counts, and he shouldn't be so picky. He found one package that was small and soft. The tag said it was from Harry Potter. Well, he thought, it would seem that we both got an unexpected present today. He ripped off the wrapping paper to find himself holding a pair of thick, woolen socks.
He smiled to himself. That boy really was remarkable. It was a shame he would soon have to endure so much hardship. He got up and went to his study, thinking that Harry would never guess that when they looked into the mirror, they both saw the same thing. Perhaps one day he would tell Harry that they had both lost family in Godric's Hollow, but he doubted it. He didn't think Harry would ever know that.