How we cite our quotes: All quotations are from Harry Potter and the Chamber of Secrets.
Quote #1
DOBBY: Dobby has heard of your greatness, sir, but never has he been asked to sit down by a wizard, like an equal.
HARRY POTTER: You can't have met many decent wizards then.
DOBBY: No, I haven't.
Poor Dobby. He's a house-elf, which means that he's basically a magical slave. Dobby's totally shocked by the fact that Harry would talk to him with any kind of respect. But Harry didn't grow up in the magical world so he doesn't have all the class baggage that someone like Draco or even Ron does. Dobby is just a weird little creature to him. Harry doesn't know that house-elves aren't unequal.
Quote #2
GILDEROY LOCKHART: Nice big smile, Harry. Together, you and I rate the front page.
Sure, Gilderoy Lockhart is famous, but Harry Potter is probably even more famous. It makes sense that Lockhart would be drawn to the Boy Who Lived—it increases his own star power to be teaching this celebrity pupil. And, unlike Harry, Lockhart needs love and adoration from society.
Quote #3
LUCIUS MALFOY: Mr. Potter! Lucius Malfoy. We meet at last. Forgive me, your scar is legend. As, of course, is the wizard who gave it to you.
HARRY POTTER: Voldemort killed my parents. He was nothing more than a murderer.
[…]
LUCIUS MALFOY: And you must be Miss Granger. Yes, Draco's told me all about you. And your parents. Muggles, aren't they? Let me see. Red hair...vacant expressions...tatty second hand book...you must be the Weasleys.
In the course of about two minutes Lucius Malfoy manages to insult just about every major character in the Harry Potter movies. He openly admires Voldemort, he looks down on Muggles, and mocks the Weasleys' financial situation. Lucius clearly thinks he's above his company. Now we know where Draco gets it from.