Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ (Eph. 4:13 KJV) The Church as a whole is the Body of Christ— one Body, with one Lord and one Master.
Endeavouring to keep the unity of the Spirit in the bond of peace (Eph. 4:3 KJV) Living in peace amongst other believers is the bond that holds the unity of the Spirit together. That means strife and contention amongst brethren will break unity. There are few things more spiritually disgusting than watching two Christians fight
And if Satan cast out Satan, he is divided against himself; how shall then his kingdom stand? (Matt. 12:26 KJV) Jesus made this powerfully truthful statement regarding the power of unity after performing many miracles, including casting out demons. The Pharisees couldn’t deny the obvious results they’d just witnessed. Instead, they tried to dismiss it