Can we be good?
C.S. Lewis gives an answer in his “Mere Christianity”:
I think all Christians would agree with me if I said that though Christianity seems at the first to be all about morality, all about duties and rules and guilt and virtue, yet it leads you on, out of all that, into something beyond. One has a glimpse of a country where they do not talk of those things, except perhaps as a joke. Every one there is filled full with what we should call goodness as a mirror is filled with light. But they do not call it goodness. They do not call it anything. They are not thinking of it. They are too busy looking at the source from which it comes.