Let the peace of Christ rule in your hearts.—Col. 3:15.
To maintain perfect unity (v. 14) believers are to let the peace of Christ rule in [their] hearts. Rule literally means “to act as umpire.” The Colossians were told earlier not to allow false teachers to “act as umpire against” them (2:18). However, when disputes arise, the believer is to let the peace of Christ make the call. Whatever will lead to peace must be the deciding factor so that peace will be preserved.” – Max Anders