" There is a display of Divine holiness in redemption. His holy nature will not allow Him to look upon sin with the least degree of allowance. Salvation is not at the expense of His holiness. The Redeemer must bear the wrath due the sinner, for wrath is the exercise of His holiness. God's hatred of sin was as much manifested in redemption as it will be in judgment. The only difference is that in redemption the guilt of the sinner is transferred to the Savior. The wrath that fell upon the Savior on Calvary had its source in the holiness of God.
God's holiness appears in human conversion. "And that ye put on the new man, which after God is created in righteousness and true holiness" (Eph. 4:24).
Holiness will be displayed in the glorification of the believer. When our salvation is consummated we will be restored to the holiness of God. We will not have His power, nor His wisdom, but we will have His holiness. The Psalmist said, "As for me, I will behold thy face in righteousness: I shall be satisfied, when I awake, with thy likeness" (Ps. 17:15). This likeness will be both moral and physical, and the moral likeness to God will be holiness. The believer, while here on earth, struggling against sin, rejoices in hope of the glory of God. "By whom also we have access by faith into this grace wherein we stand, and rejoice in hope of the glory of God" (Rom. 5:2). Sin is an awful burden to the believer; salvation is the restoration to his original holiness in creation.
The holiness of God will appear in all its purity in the day of judgment. Because God is holy, His wrath will he hot. His holy face will be too much for sinners to look upon. "And said to the mountains and rocks, Fall on us, and hide us from the face of him that sitteth on the throne, and from the wrath of the Lamb" (Rev. 6:16).
Claude Duval Cole "The doctrine of God", chap. 23, "the holiness of God".