James Buchanan – “Many lessons might be deduced from the doctrine of the Spirit’s agency as ‘the Spirit of grace and of supplication,’ applicable alike for our warning, our direction, and our encouragement in prayer.
… We learn from it that God has made the most ample provision for our being restored to his communion and fellowship: for not only is he revealed as the hearer and answerer of prayer, sitting on the throne of grace, and waiting to be gracious; and not only is Christ revealed as our advocate and intercessor, standing beside the throne, and ready to present our requests, perfumed with the incense of his own merits; but lest, when all outward impediments were removed, there might still remain some hinderance in our own hearts, the Holy Spirit is also revealed as the Spirit of grace and supplication, who intercedes for us according to the will of God; and as this precious truth should encourage us to ask his grace to help our infirmities, so it should inspire the hope of an answer in peace …”