Natural goodness, passive goodness, obedient goodness... these do not suffice here-and-now. They are a thing of the past.
Modern Human Beings of The West are structurally different from Men of the Past: our consciousness is set-up differently, our minds are differently made, we think differently.
Our alienation - the pervasive adolescent and adult starting-point of cut-off isolation from The World, from other people, from God; is not just a habit; nor is it simply the induced product of social training and propaganda - alienation is primarily something built-into modern Western consciousness.
Thus we cannot revert to ancient way, because we no longer have ancient minds. We have become something-like a different sub-species of Men; so we do not truly desire the old ways; and cannot create, dwell-in, nor sustain ancient modes of living.
Knowing this is helpful; because it clarifies that to live as God wishes us (i.e. in harmony with divine creation, living in accordance with our divine destiny) we/ here/ now require conscious-purpose, conscious-choice, an act of will, continued effort.
Christianity does not Just Happen-to people any more; and indeed is externally-discouraged (including by self-identified "Christian Churches").
Therefore; when it comes to being a Christian, and leading a Christian life: if you do not Know you are doing it, if you are not continually-choosing to do it, and if this choice does not come from inner-intuition and motivation - then you are Not doing it.