"... there isn't a single thing that you could ever do that can be undone by you. What kind of "standard" is that?"
It works for me.
One of my acquired skills and inclinations is an ability to repair things. Normally, after I have repaired something, I have no reason to undo the repair.
My philosophy is to try to make the world a better place. Would you have me undo that?
This concept is not markedly dissimilar to Davy Crockett's "Be sure you're right, then go ahead."
What if you're wrong? You certainly won't be able to undo it. Much better to be right, then you won't have to worry about undoing it.
How? And in what way?
Oh, and by the way: Do you reject God?