“But the Comforter, which is the Holy Ghost, whom the Father will send in My name, He shall teach you all things and bring all things to your remembrance, whatsoever I have said unto you.”- John 14:26

But now He was about to die. Great prophecies were to be fulfilled; and great purposes were to be answered; and therefore Jesus must go. It behoved Him to suffer, that He might be made a propitiation for our sins… It behoved Him to have a resurrection, that we, who shall one day be the dead in Christ, might rise first, and in glorious bodies stand upon earth. And it behoved Him that He should ascend up on high, that He might lead captivity captive; that He might chain the fiends of hell; that He might lash them to His chariot wheels, and drag them up high heaven’s hill, to make them feel a second overthrow from His right arm, when He should dash them from the pinnacles of heaven down to the deeper depths beneath. “It is right I should go away from you,” said Jesus, “for if I go not away, the Comforter will not come.” Jesus must go. Weep, ye disciples; Jesus must be gone. Mourn, ye poor ones, who are to be left without a Comforter. But hear how kindly Jesus speaks: “I will not leave you comfortless, I will pray the Father, and He shall send you another Comforter, who shall be with you, and shall dwell in you forever.” He would not leave those few poor sheep alone in the wilderness; He would not desert His children, and leave them fatherless. Albeit that He had a mighty mission which did fill His heart and hand; albeit He had so much to perform, that we might have thought that even His gigantic intellect would be overburdened; albeit He had so much to suffer, that we might suppose His whole soul to be concentrated upon the thought of the sufferings to be endured. Yet it was not so; before He left, He gave soothing words of comfort; like the good Samaritan, He poured in oil and wine, and we see what He promised: “I will send you another Comforter-one who shall be just what I have been, yea, even more; who shall console you in your sorrows, remove your doubts, comfort you in your afflictions, and stand as My vicar on earth, to do that which I would have done had I tarried with you.” ~ C.H. Spurgeon

http://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0005.cfm