Therefore, brethren, we are debtors, not to the flesh, to live after the flesh.
Note 26 at Ro 8:12: Paul was saying that the flesh (see note 3 at Ro 7:18) never helped us. It has been rendered powerless through sin (see note 24 at Ro 8:10). It is only through the indwelling power of the Holy Spirit that we Christians have any hope of living in victory. Therefore, we are indebted to the Spirit and should yield to Him.