It was when the betrayer had gone out that the spirit of the Son of God was free to communicate to His disciples the wondrous message, "Now is the Son of Man glorified, and God is glorified in Him. If God be glorified in Him, God shall also glorify Him in Himself, and shall straightway glorify Him" (John 13:31-32).
In Psalm 8 the glory of the Son of Man is connected with His place of exaltation, and where the Name of the Lord is excellent in all the earth. This same glory is found in Daniel 7, where the Son of Man receives from the Ancient of days a universal and eternal dominion.
What the Lord revealed in John 13 to His disciples was His glory displayed in His death upon the cross, and consequent to it His present glory in the presence of the Father. Against the dark background of the exposure of man after the flesh, as seen in Judas, is the outshining of the glory of the moral perfections of the Son of Man. In Jesus we see what Man is for the deep delight of the heart of God, One who not only lived constantly for His will and pleasure, but who, in the perfection of His obedience and submission to Him, entered into death, and all that the death of the cross meant to the perfect One.
Not only do the moral perfections of the Son of Man shine in divine and heavenly lustre from the cross, but the Holy One completed on the cross a great work that secured all the purposes of God. There was no other way of accomplishing God's eternal purpose than through redemption, and in the cross the glory of God in regard to sin, and for the fulfilling of all His will, is there secured by the Son of Man. So that where God's glory is secured, the glory of Him that secured it shines brightly. On account of what God's Son has done, as has been said, God is indebted to Man in Christ for His glory.
God has been infinitely glorified both by the obedience of the Son of Man unto death, and in the Son of Man procuring the glory of redemption. Earlier in John's Gospel, the Son of God had spoken of Himself as Son of Man in relation to the blessing of men. He was to be lifted up so that eternal life might be available to men through faith (John 3:14-15); He was to die so that men might eat His flesh and drink His blood to appropriate the blessing of God (John 6:53-56). Here we learn how God's glory is linked with our blessing.
Having glorified God in His death, the Son of Man was to be glorified by God. He was to be glorified "in Himself," which tells of the divine glory of the Son, for only a divine Person could be glorified in this way, but it was as having glorified God as Man that He received this divine glory. Moreover, He was to have this place immediately, and not to wait for it till the world to come, when He shall be publicly displayed in His glory as Son of Man, and in the Father's glory, and in the glory of the holy angels (Luke 9:26).