Draco Malfoy: Maybe I did hex that Bell girl. Maybe I didn’t. What’s it to you?

Severus Snape: I swore to protect you. I made the Unbreakable Vow.

Draco Malfoy: I don’t need protection. I was chosen for this. Out of all others. Me. And I won’t fail him.

Severus Snape: You’re afraid, Draco. You attempt to conceal it, but it’s obvious. Let me assist you.

Draco Malfoy: No! I was chosen. This is my moment.

From Harry Potter and the Half-Blood Prince (2009) | Produced by Warner Bros.