Hence the Evangelist says, as already mentioned: “Tell ye the daughter of Zion.” And the prophet says: “Rejoice greatly, O daughter of Zion, behold thy King cometh unto thee,” as if he would say: This is told to you and God wishes to have it proclaimed to you, that you may find consolation in Him by faith, and be defended by such faith against doubt and despair on account of your unworthiness and sins. What is it that is told, and on account of which she is to rejoice? It is this: “Behold thy King cometh unto thee.” What kind of a king? A holy and just King, a Physician and Savior, or Helper, who would heal and save you. He would give His glory and righteousness to you, that you may be free from your sins; His life also He would lay down for you, that through His death you may be delivered from eternal death. Therefore be not offended at His lowly and humble form, but thank Him for it, and comfort yourself in Him. For all that He does and accomplishes in His coming, is done for your good; thus He would deliver you from your sins and from death, and justify and save you.  (Luther’s House Postil, Sermon for the 1^st Sunday in Advent, Volume 1, p. 20-21)

Whoever will not receive this with his ears and heart, but would see it with his eyes and feel it with his hands, deprives himself of this King; for it is very different from what we find it with other kings. What they do, they do with pomp, and everything has a grand, imposing appearance. In Christ we do not find this; His office and work is to help us from sin and death, and this He does in no other external manner but through His word and gospel, which He orders to be told and preached to us, and through the signs which He gives besides the promise, through which also He works and shows His power; as that He first plunges us into baptism, where our eyes see nothing but simple water, like other water. Likewise, He has comprehended it in the word we are preaching, where our eyes see nothing but man’s breath. But we must beware and not follow our eyes here, but shut our eyes, open our ears and hear the word. This teaches us how our Lord Jesus shed His blood for the forgiveness of our sins, that we might live. These gifts He would bestow upon us in holy baptism, in the Lord’s Supper, in the preaching and absolution; there we certainly find them. Now it is true, it seems small matter. that through the washing of water, through the word and sacrament, such great things should be accomplished; but do not let your eyes deceive you. There also it seemed a small matter that He who rode on a borrowed ass, and afterwards suffered Himself to be crucified, should take away sin, death and hell. No one could see it in His appearance; but the prophet says so. Therefore we must simply receive it with our ears, and believe it with our hearts; with our eyes we cannot see it. (Luther’s House Postil, Sermon for the 1^st Sunday in Advent, Volume 1, p. 20)