According to the Heidelberg Catechism, to affirm “one holy catholic church” means, “I believe that the Son of God, through his Spirit and Word, out of the entire human race, from the beginning of the world to its end, gathers, protects, and preserves for himself a community chosen for eternal life and united in true faith. And of this community I am and always will be a living member.”

 - The Christian Faith: A Systematic Theology for Pilgrims on the Way (Horton, Michael S.)

But if the ministry that produced death—carved in letters on stone tablets–came with glory, so that the Israelites could not keep their eyes fixed on the face of Moses because of the glory of his face (a glory which was made ineffective), how much more glorious will the ministry of the Spirit be? For if there was glory in the ministry that produced condemnation, how much more does the ministry that produces righteousness excel in glory! For indeed, what had been glorious now has no glory because of the tremendously greater glory of what replaced it. For if what was made ineffective came with glory, how much more has what remains come in glory!

 - 2 Corinthians 3:7–11, NET