We are stuck with not knowing what our actions will actually lead to.

As beings who cannot know the outcome of any particular action, it is difficult for us to act in a way that will be necessarily beneficial to another, or necessarily detrimental.

The important thing for me is that one accepts that one is irretrievably flawed and as you say, takes responsibility for those flaws, rather than hiding them in some code that allows this and doesn't allow that as if there were a way of being sure of how to be good in the world.

Now I'm a Catholic agnostic by the way. Yet those myths still live within me.

There's a tangle between weakness and vulnerability.