Today is the 27th anniversary of my formal entry into the Orthodox Christian Faith. Unlike my departure from frank evangelicalism for Calvinism two decades earlier, this felt like a conversion, not an incidental change of denomination.

Part of that feeling may have been that the evangelical-to-Calvinist transition was largely invisible to observers: I didn’t quit our Baptist church and go to the tiny PCA startup in town; instead I moved across the country to go back to school, so of course I had to find a new church; I graduated, moved, and began practicing law in my hometown, so again I had to find a new church.

That each of those steps was away from evangelicalism and toward Calvinism would have been apparent only to someone for whom the permeability of denominational walls in Protestantism seems odd, and I think most Protestants take that permeability for granted. Indeed, during this transition, I published a law journal note titled Church Property Disputes in an Age of Common-Core Protestantism, based on the premise that someone who became a Presbyterian or Methodist or Episcopalian was unlikely to be buying into denominational ownership or control of the local church’s temporalities that he (or she) now donated to maintaining.

But another part of the “conversion” sensation certainly was that I had to be catechized to enter Orthodoxy. Its walls are not permeable. I became an “ecclesial Christian” as Richard John Neuhaus described it: one for whom faith in Christ and faith in His Church is one act of faith, not two. I finally believed that the one holy, catholic and apostolic church is visible and distinct, not invisible and amorphous.

Today, I’m more interested in a question one could phrase in an article title as Church Discipline in an Age of Permeable-Wall Protestantism. Others have doubtless gone deeper into the topic of how there can be effective church discipline, how can flagrant sinners be brought to repentance, when they can just move to another church before the heat melts their hearts? But in a largely Protestant nation, it’s hard for an ecclesial Christian not to dabble in other people’s business.