The Christian church on earth is never a showcase of perfect people, but more like a hospital of recovering sinners, who are to assist each other in this journey of recovery. True believers in Jesus Christ come from many different backgrounds, cultures, and ways of life, with various life stories, and have different personalities, and different levels of faith. These differences can create tension and disharmony in the church, but the Lord has given very clear and extensive directions on dealing with these issues. This is the subject of this series of lectures, with a focus on the Scriptures from Romans 14 and 15.