“In the upper room, after Judas had gone out into the night to betray Him, Jesus said, ‘Now is the Son of man glorified, and God is glorified in Him’ (John 13:31). What did He mean? ‘Son of man’ was His name for Himself as the Saviour-King who before being enthroned must fulfill Isaiah 53; and when He spoke of the present glorifying of the Son of man, and of God in Him, He was thinking specifically of the atoning death, the ‘lifting up’ on the cross, which Judas had gone to precipitate. Do you see the glory of God in His wisdom, power, righteousness, truth, and love, supremely disclosed at Calvary, in the making of propitiation for our sins? The Bible does; and we venture to add, if you felt the burden of your own sins at its true weight, so would you. In heaven, where these things are better understood, angels and men unite to praise ‘the Lamb that was slain’ (Revelation 5:11 ff.; 7:9 ff.). Here on earth those who by grace have been made spiritual realists do the same.” (J. I. Packer, Knowing God, chapter 18)
I Commend Joy! 