Nor was I, but one day an Autobot shall rise from our ranks and use the power of the Matrix to light our darkest hour.
20 seconds sound clip from the The Transformers: The Movie movie soundboard.
You can hear this line at 00:24:47 in the Blu-ray version of the movie.
Quote context
[...]
- Prime...
- Ultra Magnus, it... it is to you, old friend...
- I shall pass the Matrix of Leadership as it was passed to me.
- But, Prime, I am... just a soldier, I... I'm not worthy.
- Until that day... till all are one...
- Jettison, some weight or I'll never make it to Cybertron!
- Astrotrain has requested that we lighten our burden.
[...]