Dumbledore Wisdom

The title says it all

Philosopher's Stone

"I see myself holding a pair of thick, woolen socks." Harry stared. "One can never have enough socks," said Dumbledore. "Another Christmas has come and gone and I didn't get a pair. People will insist on giving me books."

Chamber of Secrets

"It is our choices Harry, that show what we truly are, far more than our abilities."

Prisoner of Azkaban

"You think the dead we loved ever truly leave us? You think we don’t recall them more clearly than ever in times of great trouble? Your father is alive in you, Harry, and shows himself plainly when you have need of him. How else could you produce that particular Patronus? Prongs rode again last night."

Goblet of Fire

"You are blinded," said Dumbledore, his voice rising now, the aura of power around him palpable, his eyes blazing once more, "by the love of the office you hold, Cornelius! You place too much importance, and you always have done, on the so-called purity of blood! You fail to recognize that it matters not what someone is born, but what they grow up to be!"

Order of the Pheonix

An awful voice filled the kitchen, echoing in the confined space, issuing from the burning letter on the table.
"REMEMBER MY LAST, PETUNIA."
Aunt Petunia looked as though she might faint.

Half-Blood Prince

"And now, Harry, let us step out into the night and pursue that flighty temptress, adventure."