We Catholics are aware of this passage. Those who pray the Liturgy of the Hours daily read it just a few weeks ago and read it every year. And of course we are aware of the question of how it touches on our idea of apostolicity.
But if we were to struggle to articulate our thinking to the point where it seemed that you understood it, we would never get done. It would deteriorate into bedlam and insult as these conversations always do.
When I think of the number of non-Christians of any kind who come by and see how we behave, I am embarrassed.