Luther continues: "This is the way the devil goes to work. He attacks Christ with three storm-columns. One will not suffer Him to be God; the other will not suffer Him to be man, the third denies that He has merited salvation for us. Each of the three endeavors to destroy Christ. For what does it avail that you confess Him to be God if you do not also believe that He is man? For then you have not the entire and the true Christ, but a phantom of the devil. What does it avail you to confess that He is true man if you do not also believe that He is true God? What does it avail you to confess that He is God and man if you do not also believe that whatever He became and whatever He did was done for you?" "Surely, all three parts must be believed, namely, that He is God, also, that He is man, and that He became such a man for us, that is, as the first symbol says: conceived by the Holy Ghost born of the Virgin Mary, suffered, was crucified, died, and rose again, etc. If one small part is lacking, then all parts are lacking. For faith shall and must be complete in every particular. While it may indeed be weak and subject to afflictions, yet it must be entire and not false. Weakness [of faith] does not work the harm but false faith--that is eternal death." (St. L. 10, 998; E. 23, 258.) Concerning the mystery involved in the doctrine of the Holy Trinity, the chief topic of the Ecumenical Creeds, Luther remarks in the same tract: "Now, to be sure, we Christians are not so utterly devoid of all reason and sense as the Jews consider us, who take us to be nothing but crazy geese and ducks, unable to perceive or notice what folly it is to believe that God is man, and that in one Godhead there are three distinct persons. No, praise God, we perceive indeed that this doctrine cannot and will not be received by reason. Nor are we in need of any sublime Jewish reasoning to demonstrate this to us. We believe it knowingly and willingly. We confess and also experience that, where the Holy Spirit does not, surpassing reason, shine into the heart, it is impossible to grasp, or to believe, and abide by, such article; moreover, there must remain in it [the heart] a Jewish, proud, and supercilious reason deriding and ridiculing such article, and thus setting up itself as judge and master of the Divine Being whom it has never seen nor is able to see and hence does not know what it is passing judgment on, nor whereof it thinks or speaks. For God dwells in a 'light which no man can approach unto,' 1 Tim. 6, 16. He must come to us, yet hidden in the lantern, and as it is written, John 1, 18: 'No man hath seen God at any time; the only-begotten Son, which is in the bosom of the Father, He hath declared Him,' and as Moses said before this, Ex. 33: 'There shall no man see Me [God] and live.'" (St. L. 10, 1007; E. 23, 568.) III. The Augsburg Confession. 18. Diet Proclaimed by Emperor.