“Roll” membership in an earthly institution, even one called a “church,” is not joining the Body of Christ. I did not join the Body of Christ by joining an earthly “grouping.”
I was baptized by the Holy Spirit (1 Cor. 12:13; Colossians 2:11, 12) and circumcised with a circumcision not made with hands, and made a member of Christ by “the operation of God” (Col. 2:12). Joining an earthly “grouping” of believers does not enhance that standing, nor can not joining one hinder it.
Such a standing is available to any sinner who will come to Christ (not an earthly “grouping”) personally by faith in the all-sufficiency of His shed Blood for the satisfaction of God's Righteousness in the matter of payment for sins.
You know...I tried all that.
It didn’t work.
Eating the Real Body and drinking the Real Blood of Christ: that worked.
God Bless you brother!