Lyric discussion by norangelsordemons 

Cover art for Sister lyrics by Mumford & Sons

I think its about a family who have been through so much. But the 'sister' wants to run away from home to fulfill her dreams and feel alive.. 'If you want to feel alive Then learn to love your ground' but the brother narrating the story is saying that in order to feel better about her life then she should learn to love her home and surroundings. And the family obviously dont want her to leave 'Sister don't let go Sister don't let go of us'

My Interpretation