Difference between the Full Metal Alchemist Brotherhood opening 1 and the original song?

Hi!
I fell in love with the opening 1 for FMA Brotherhood, Again by Yui, as soon as I heard it. I especially love the beginning of the opening. I found the original song on Youtube but it does not have my favorite part at the beginning that leads into the guitar parts.

Here’s the beginning lyrics I cannot find:
Kono omoi wo keshite shimau ni wa
Mada jinsei nagei deshou?
Yorinokoshiteru koto
Yarinaoshite mitai kara

Is this part only for the anime opening, or is it somewhere in the song and I just can’t find it?
-Thanks