Lyric discussion by TheWrongGirl 

it almost sounds like she's saying "...for what i LACK wouldn't let me"... which doesn't actually make sense really. but, i admit, i sort of like it better that way.

I feel like its her accent that makes it seem like "lack" . I can see where you are coming from there.

I interpret it as like 'couldn't turn my back on a world for what i like wouldn't let me' means something a person is so passionate about, they can't turn away from it and sacrifice it for another person or love itself.

And then the next line "on a world for what i like, i needed'. What they are so passionate about they can't live without.

I've got Laura's new album, which has included a lyric book.

A few corrections...

It's actually "I am lower now, and lower still" in place of "I am Laura now, and Laura still".

TheWrongGirl is actually right... She sings:

"But I couldn't turn my back On a world for what I lack wouldn't let me But I couldn't turn my back On a world for what I like I need it"

An error occured.