When he was gone, Jesus said, “Now is the Son of Man glorified and God is glorified in him.
When the traitor left, the company was purged of its evil element and the betrayal itself was now underway. The saving act on Calvary has been launched!
“Now” points to present circumstances. Since the betrayal is underway, the glorification of Christ has commenced. This is the last time the term “Son of Man” is used in this gospel. That, coupled with the use of the aorist tense in “glorified” (which means that the glorification is as a completed whole) is as if the act of salvation has aleady been completed by its very beginning. There was no chance that Jesus was going to quit, and nothing can prevent the completion of this glorification.
Notice that the glorification of Christ comes as a result of what man would think is the very opposite of glory. Origen uses the phrase “humble glory” to express this idea of glory coming through death on a cross. Note also that God the Father is also glorified through the cross. As Morris notes, “The cross shows us the heart of God as well as that of Christ.”