Colossians 3:15

peace of God--The oldest manuscripts and versions read, "The peace of CHRIST" (compare Phi 4:7). "The peace of GOD." Therefore Christ is God. Peace was His legacy to His disciples before He left them (Joh 14:27), "MY peace I give unto you." Peace is peculiarly His to give. Peace follows love (Col 3:14; Eph 4:2-3). rule--literally, "sit as umpire"; the same Greek verb simple, as appears compounded (Col 2:18). The false teacher, as a self-constituted umpire, defrauds you of your prize; but if the peace of Christ be your umpire ruling in your hearts, your reward is sure. "Let the peace of Christ act as umpire when anger, envy, and such passions arise; and restrain them." Let not those passions give the award, so that you should be swayed by them, but let Christ's peace be the decider of everything. in your hearts--Many wear a peaceful countenance and speak peace with the mouth, while war is in their hearts (Psa 28:3; Psa 55:21). to the which--that is, with a view to which state of Christian peace (Isa 26:3); Co1 7:15, "God hath called us to peace." ye are called--Greek, "ye were also called." The "also" implies that besides Paul's exhortation, they have also as a motive to "peace," their having been once for all called. in one body-- (Eph 4:4). The unity of the body is a strong argument for "peace" among the members. be ye thankful--for your "calling.

— Jamieson-Fausset-Brown Commentary (public domain)