The weight is not yours to carry

[H]ope can […] be a course of action. When you've done everything you can, and that's all you can do, you can rest with peace in hope until another course of action presents itself.

Also, it’s ok to lose a battle. As long as you don’t lose what you believe in, you haven’t lost yet.

Oh, God, give us courage to change what must be altered, serenity to accept what can not be helped, and insight to know the one from the other.

Serenity Prayer