I'm sorry that you grieve
As I take my leave
This my sacrifice
Should it suffice
Even if it meant
That you would resent
These would be the words of someone who unfortunately has to part ways with a person who is dear to them through a path that may lead the person to a state wherein he/she may have deep regret or hatred soon after. And that someone tried everything they can for that person. In a matter of life and death, no matter what situation. This is a sacrifice that is surely enough.
One's life.