The new man is the new spiritual essence or life, which the Holy Spirit has created in us by regenerating us in Holy Baptism. It lives before God in righteousness and purity, hence in true faith, and a holy life without pretense. Only believers have a new man, which also through the Holy Spirit crucifies the old man.
2 Cor. 5:17: If any man be in Christ, he is a new creature.
Rom. 7:6: That we should serve in newness of Spirit.
Eph. 4:24: Put on the new man, which after God is created in righteousness and true holiness.
Col. 3:10: Ye have put on the new man, which is renewed in knowledge after the image of him that created him.
Rom. 8:13: If ye through the Spirit do mortify the deeds of the body, ye shall live.
Assignment: Formulate a definition of the new man on the basis of the quotation from Luther in the preceding question, but using opposite characteristics that apply.