I suppose that there was ringing in Paul's head some echoes of the music of Isaiah's words, 'How beautiful upon the mountains are the feet of Him that bringeth good tidings, that publisheth peace, that bringeth good tidings of good!' But there is a great deal more than an unconscious quotation of ancient words here; for in Paul's thought, the one power which brings a man into harmony with the universe and to peace with himself, is the power which proclaims that God is at peace with him. And Jesus Christ is our peace, because He has swept away the root and bitter fountain of all the disquiet of men's hearts, and all their chafing at providences--the consciousness that there is discord between themselves and God. The Gospel brings peace in the deepest sense of that word, and, primarily, peace with God, from out of which all other kinds of tranquillity and heart-repose do come--and they come from nothing besides. But what strikes me most here is not so much the allusion to the blessed truth that was believed and experienced by these Ephesian Christians, that the Gospel brought peace, and was the only thing that did, as the singular emergence of that idea that the Gospel was a peace-bringing power, in the midst of this picture of fighting. Yes, it brings both. It brings us peace first, and then it says to us, 'Now, having got peace in your heart, because peace with God, go out and fight to keep it.' For, if we are warring with the devil we are at peace with God; and if we are at peace with the devil we are warring with God. So the two states of peace and war go together. There is no real peace which has not conflict in it, and the Gospel _is_ 'the Gospel of peace,' precisely because it enlists us in Christ's army and sends us out to fight Christ's battles.