Unity in the church is not an option. It is a must have. Elder Harter gives us 4 lessons in unity from Philippians chapter 2.
1) The Motive for Unity
2) The Characteristics of Unity
3) The Method of Unity
4) The Model of Unity
“If there be therefore any consolation in Christ, if any comfort of love, if any fellowship of the Spirit, if any bowels and mercies, Fulfil ye my joy, that ye be likeminded, having the same love, being of one accord, of one mind. Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves. Look not every man on his own things, but every man also on the things of others. Let this mind be in you, which was also in Christ Jesus” ~Philippians 2:1-5