And for us all, let us see that we lay to heart the large truths of this text, and give them that personal bearing without which they are of no avail. _I_ need renovation in my inmost nature. Nothing can renew _my_ soul but the power of Christ, who is _my_ life. _I_ am naked and foul. Nothing can cleanse and clothe _me_ but He. The blessed truth which reveals Him calls for _my_ individual faith. And if _I_ put _my_ confidence in that Lord, He will dwell in _my_ inmost spirit, and so sway _my_ affections and mould _my_ will that _I_ shall be transformed unto His perfect likeness. He begins with each one of us by bringing the best robe to cast over the rags of the returning prodigal. He ends not with any who trust Him, until they stand amid the hosts of the heavens who follow Him, clothed with fine linen clean and white, which is the righteousness of His Holy ones. GRIEVING THE SPIRIT 'Grieve not the Holy Spirit of God, whereby ye are sealed unto the day of redemption.'--Eph. iv. 30. The miracle of Christianity is the Incarnation. It is not a link in a chain, but a new beginning, the entrance into the cosmic order of a Divine Power. The sequel of Bethlehem and Calvary and Olivet is the upper room and the Pentecost. There is the issue of the whole mission and work of Christ--the planting in the heart of humanity of a new and divine life. All Christendom is professing to commemorate that fact to-day, [Preached on Whitsunday] but a large portion of us forget that it was but a transient sign of a perpetual reality. The rushing mighty wind has died down into a calm; the fiery tongues have ceased to flicker on the disciples' heads, but the miracle, which is permanent, and is being repeated from day to day, in the experience of every believing soul, is the inrush of the very breath of God into their lives, and the plunging of them into a fiery baptism which melts their coldness and refines away their dross. Now, my text brings before us some very remarkable thoughts as to the permanent working of the Divine Spirit upon Christian souls, and upon this it bases a very tender and persuasive exhortation to conduct. And I desire simply to try to bring out the fourfold aspect in those words. There is, first, a wondrous revelation; second, a plain lesson as to what that Divine Spirit chiefly does; third, a solemn warning as to man's power and freedom to thwart it; and, lastly, a tender motive for conduct. 'Grieve not the Holy Spirit, whereby ye are sealed unto the day of redemption.' Now let us look briefly at these four thoughts: Here we have-- I. A wonderful revelation.