The One Holy catholic and Apostolic Church is not a sect.
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I suppose I could agree that CHRIST'S BODY is not a minor sect.
But CHRIST'S BODY includes believers from all sect's . . . sectarian groups . . . incluring RC's et al
You mean the Mormons, Arians, Ebonites, Monophysites, Jehova's Witnesses, and everyone outside of His One, Catholic, and Apostolic Church who calls on His name? I don't think so!
Why, your definition would include the devil himself!