I think it's about the narrator telling the person (maybe a relationship or just a friendship)that she knows life is taking a toll on them but if they believed in a higher power (Assuming God in this case) it could be easier on them. She mentions the word "again" pretty often hinting that this person used to believe but their faith is either slipping or lost. It's obvious they're struggling, due to the chorus. Overall, it's obviously about someone losing their faith and her telling them to regain it to make life smoother.
I think it's about the narrator telling the person (maybe a relationship or just a friendship)that she knows life is taking a toll on them but if they believed in a higher power (Assuming God in this case) it could be easier on them. She mentions the word "again" pretty often hinting that this person used to believe but their faith is either slipping or lost. It's obvious they're struggling, due to the chorus. Overall, it's obviously about someone losing their faith and her telling them to regain it to make life smoother.