There is no one organization that is considered the one true church.
The church is made up of individuals. Those individuals will come from several different organizations, and some from no organization at all.
Membership is not a prerequisite.
Spot on!
“There is no one organization that is considered the one true church.”
You clearly haven’t looked into this.
Well,. there is also the one true church (sect) within the one true church:
[Catholic Caucus] A Snapshot of the Church before Vatican II: How Today’s Crisis Cures the Pre-Conciliar Ills 10/12/2022, 6:34:44 PM · by ebb tide · 4 replies The Remnant Newspaper ^ | October 10, 2022 | Robert Morrison [Catholic Caucus] A Snapshot of the Church before Vatican II: How Today’s Crisis Cures the Pre-Conciliar IllsAlthough Francis has tried his best to make it clear, some faithful Catholics still do not accept the reality that certain parts of Vatican II itself are opposed to what the Church has always taught.
The only one true church is the mystical body of Christ which the Spirit baptizes one into (1 Co. 12:13) upon regeneration by heart-purifying faith, (Acts 10:43-47; 15:7-9) and to which Christ is married, (Ephesians 5:30-32) for it alone only and always consists only of true believers, while the organic fellowships which believers are normally part of end up being admixtures of wheat and chaff.