Colossians: The theme is that the Colossians must remain faithful to the traditional faith that has been given to them, and they must avoid all false teaching, whether pagan or Jewish. Christ in us is the mystery. The mystery means that the risen Christ is God and is in us by His grace, which we receive through faith and Baptism. Taken from a series of sermons given by Father Kenneth Baker on the Letters of Saint Paul the Apostle: Sermon 10 of 17