An intense cold swept over them all. Harry felt his own breath catch in his chest. The cold went deeper than his skin. It was inside his chest, it was inside his very heart. . . .Harry’s eyes rolled up into his head. He couldn’t see. He was drowning in cold. There was a rushing in his ears as though of water. He was being dragged downward, the roaring growing louder . . .And then, from far away, he heard screaming, terrible, terrified, pleading screams. He wanted to help whoever it was, he tried to move his arms, but couldn’t . . . a thick white fog was swirling around him, inside him —
Sure you can manage that broom, Potter?" said a cold, drawling voice.Draco Malfoy had arrived for a closer look, Crabbe and Goyle right behind him."Yeah, reckon so," said Harry casually."Got plenty of special features, hasn't it?" said Malfoy, eyes glittering maliciously. "Shame it doesn't come with a parachute - in case you get too near a Dementor."Crabbe and Goyle sniggered."Pity you can't attach an extra arm to yours, Malfoy," said Harry. "Then it could catch the Snitch for you.
You can exist without your soul, you know, as long as your brain and heart are still working. But you’ll have no sense of self anymore, no memory, no . . . anything. There’s no chance at all of recovery. You’ll just — exist. As an empty shell. And your soul is gone forever . . . lost.
Not an exact quote, more like an opinion, a thought. Dementors suck out happiness from people. The make people remember their worst moments in life. The way to defeat them / repel them is to cast a patronus charm, [incantation: expecto patronum. If my latin serves me right it means "I expect / I command my patron].The difficulty lies in casting the charm while those foul creatures make you feel terrible and the charm only works if you can conjure up a most happy memory.I suggest a new / additional interpretation of JK Rowling's idea:Demen - tors are your inner demons that make you feel terrible, things you did in your life, terrible losses you experienced (Harry hears his mother's screams) and negative emotions.Those inner demons TORment you and your soul. You can only escape those horrible impressions with an overwhelming positive force of imagination. Happy moments in your life, thoughts about friends, family, love and connection versus the horrible loneliness that your inner demons create.