NET
15 Let the peace of Christ be in control in your heart (for you were in fact called as one body to this peace), and be thankful.
Darby
15 And let the peace of Christ preside in your hearts, to which also ye have been called in one body, and be thankful.
KJV
15 And let the peace of God rule in your hearts, to the which also ye are called in one body; and be ye thankful.