NKJV - 7 Nevertheless I tell you the truth. It is to your advantage that I go away; for if I do not go away, the Helper will not come to you; but if I depart, I will send Him to you.
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Jesus said he is a comforter sent from God, to bring things back to our remembrance, whatever Jesus has said to us. Since we are in a spiritual war it has to be fought spiritually. We must remember the battle is not ours, it is the Lord's. We must remember the battle is already won. Calvary took care of that.