You are a Ring-bearer, Frodo. To bear a Ring of Power is to be alone.
9 seconds sound clip from the The Lord of the Rings: The Fellowship of the Ring movie soundboard.
You can hear this line at 02:45:11 in the Blu-ray version of the movie.
Quote context
[...]
- All shall love me and despair.
- I will diminish and go into the West and remain Galadriel.
- You are a Ring-bearer, Frodo. To bear a Ring of Power is to be alone.
- This is Nenya, the Ring of Adamant. And I am its keeper.
- This task was appointed to you. And if you do not find a way, no one will.
- Then I know what I must do. It's just... I'm afraid to do it.
- Even the smallest person can change the course of the future.
[...]