But he doesn't understand. I'm never alone. Never.
8 seconds sound clip from the Harry Potter and the Sorcerer's Stone movie soundboard.
You can hear this line at 02:14:57 in the Blu-ray version of the movie.
Quote context
[...]
- Snape, unfortunately, wasn't fooled.
- While everyone else was running about dungeon, he went to the third floor to head me off.
- He, of course, never trusted me again. He rarely left me alone.
- But he doesn't understand. I'm never alone. Never.
- Now, what does this mirror do? I see what I desire.
- I see myself holding the Stone. But how do I get it?
[...]