Unity in the Body of Christ is one of the indications to the world of Christ’s reality and divine love for them. “I in them, and Thou in Me, that they may be made perfect in one; and that the world may know that Thou hast sent Me, and hast loved them, as Thou hast loved Me” (John 17:23 KJV). As important as unity is, Christians need to be even more careful about the teachings or “principles of the doctrine of [concerning] Christ” (Hebrews 6:1), because “whosoever transgresseth, and abideth not in the doctrine of [concerning] Christ, hath not God” (2John 1:9). Since “a little leaven leaveneth the whole lump” (1Corinthians 5:5-6; Galatians 5:9), once those in our Christian fellowship adamantly maintain doctrines about Christ contrary to the truth, either they depart from our fellowship or you depart from them. “If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed: For he that biddeth him God speed is partaker of his evil deeds” (2John 1:10-11).
For instance, if in your attempt for ecumenical unity and cooperation, you found one of the church participants, such as the Roman Catholic Church, teaching Mary as “Co-redemptrix, Mediatrix of all Graces and Advocate,” i.e., “Mary’s singular and unique sharing with her Son in the saving work of Redemption for the human family,” then you must reject your association with that church. “Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved” (Acts 4:12). The purity of your devotion to Christ requires you to “come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you” (2Corinthians 6:17). If our actions represent our devotion to Christ, then we are defending Christ, not just words, teachings, or doctrines about Christ. Father, cause our devotion to You to be greater than our attempt to prove the correctness of our doctrine or the incorrectness of anyone else. Preserve Your people in loving obedience and cast out the bondwoman who would draw us back to Babylon. In Jesus’ name, we pray. Amen and amen.