It means far more than sentiment, verbiage, and nomenclature. It means to stand in His stead, to bear His nature, to stand for all for which He stood, for righteousness, truth, holiness and zeal. It means to be one with God as He was, one in spirit, in will and in purpose. It means that our praying is singly and solely for God's glory through His Son. It means that we abide in Him, that Christ prays through us, lives in us and shines out of us; that we pray by the Holy Spirit according to the will of God.
