Depression isn't just being a bit sad. It's feeling nothing. It's not wanting to be alive anymore.
J. K. RowlingLook...at...me..." he whispered. The green eyes found the black, but after a second, something in the depths of the dark pair seemed to vanish, leaving them fixed, blank, and empty. The hand holding Harry thudded to the floor, and Snape moved no more.
J. K. RowlingAnd it’s Johnson, Johnson with the Quaffle, what a player that girl is, I’ve been saying it for years but she still won’t go out with me —” “JORDAN!” yelled Professor McGonagall. “Just a fun fact, Professor, adds a bit of interest —
J. K. RowlingBut you're dead," said Harry. "Oh yes," said Dumbledore matter-of-factly. "Then...I'm dead too?" "Ah," said Dumbledore, smiling still more broadly. "That is the question, isn't it? On the whole, dear boy, I think not.” They looked at each other, the old man still beaming. "Not?" repeated Harry. "Not," said Dumbledore. "But…" Harry raised his hand instinctively toward the lightning scar. It did not seem to be there. "But I should have died—I didn't defend myself! I meant to let him kill me!" "And that," said Dumbledore, "will, I think, have made all the difference.
J. K. Rowling