“Personally, I'd have welcomed a dementor attack. A deadly struggle for my soul would have broken the monotony nicely.”
“Oh well... I'd just been thinking, if you had died, you'd have been welcome to share my toilet.”
“Dementors are among the foulest creatures that walk this earth. They infest the darkest, filthiest places, they glory in decay and despair, they drain peace, hope, and happiness out of the air around them. Even Muggles feel their presence, though they can’t see them. Get too near a Dementor and every good feeling, every happy memory will be sucked out of you. If it can, the Dementor will feed on you long enough to reduce you to something like itself — soul-less and evil. You’ll be left with nothing but the worst experiences of your life.”
“The dementors send their love, Potter!”
“You can't give a Dementor the old one-two!”
“He must have known I'd want to leave you.""No, he must have known you would always want to come back.”
“And now a chill settled over them where they stood, and Harry heard the rasping breath of the dementors that patrolled the outer trees. They would not affect him now. The fact of his own survival burned inside him, a talisman against them, as though his father's stag kept guardian in his heart.”