See below, Luther's Commentary on John 1:1-14. It's refreshing to find such clear and assured advice concerning the interpretation of Scripture!
A great--and increasingly rare--reminder. When a great mind such as his admits defeat ("Believe me, as one who has experienced and tried it..."), supressing his reason to the sufficiency of The Word, we would be wise to take heed!
John 1:2: “The same was in the beginning with God.”
"The Word was with God, with God, and yet God was the Word. Thus the Evangelist contends that both assertions are true: God is the Word, and the Word is with God; one nature of divine essence, and yet not one person only. Each person is God complete and entire, in the beginning and eternally. These are the passages upon which our faith is founded and to which we must hold fast. For it is entirely above reason that there should be three persons and each one perfect and true God, and yet not three Gods but one God.
The Scholastics have argued much pro and con with their numerous subtleties, to make this doctrine comprehensible. But if you do not wish to become entangled in the meshes of the enemy, ignore their cunning, arrogance, and subtleties, and hold to these divine words. Press into them and remain in them, like a hare in a rocky crevice. If you come out and deign to listen to human talk, the enemy will lead you on and overcome you, so that you will at last not know where reason, faith, God, or even yourself are.
Believe me, as one who has experienced and tried it, and who does not talk into an empty barrel; the Scriptures are not given us for naught. If reason could have kept on the right road, the Scriptures would not have been given us. Take an example in the case of Arius and Sabellius. Had they clung to the Scriptures and disregarded reason, they would not have originated so much trouble in the church. And our Scholastics might have been Christians, had they ceased fooling with their subtleties and had clung to the Scriptures."