If I could Emily Dickinson
I think the title is like about her wanting to do something.
if i could stop every heart from breaking i would not feel terrible if i can stop someone from hurting or ease their pain or help someone find their home i would not feel terrible.
It means that she wants to stop everyone from hurting.
There is no change or shift.
she wants to keep everyone from hurting.
Wanting to help everyone to not have a bad day.