Lyric discussion by coldasice 

Cover art for Believe lyrics by Mumford & Sons

I think the song is about a communication issue between two people who have a romantic interest in each other. There is something in the water between the two. And they both know it, and have known for a long time. One side admits it, while the other doesn't.

One side wants to confirm whether or not this romance exists once and for all. But the breaking down and climbing over of relational walls and mountains has left this person drained, exhausted, and burned out from chasing for too long. It almost sounds like a final pleading for the other's affection, before being able to let go if nothing shows for that effort.

My Interpretation