Kristen's figured something important out: "the addition of 'Harry' to almost any Plato quote makes it seem legitimately like a nugget of wisdom out of the mouth of Albus Dumbledore."
"Death is not the worst that can happen to men, Harry."
"Harry, good actions give strength to ourselves and inspire good actions in others."
"He who commits injustice is ever made more wretched than he who suffers it, Harry."
"Harry, how can you prove whether at this moment we are sleeping, and all our thoughts are a dream; or whether we are awake, and talking to one another in the waking state?"
(via Making Light)