John Calvin on John 12:23

23. The hour is come. Many explain this as referring to the death of Christ, because by it the glory of Christ was manifested; so that, in their opinion, Christ now declares that the time of his death is at hand. But I rather view it as referring to the publication of the gospel; as if he had said, that the knowledge of him would soon be spread through every region of the world. Thus he wished to meet the astonishment which his death might excite in his disciples; for he shows that there is no reason why their courage should fail, because the doctrine of the’ gospel will nevertheless be proclaimed throughout the whole world. Again, that this contemplation of his glow may not soon afterwards vanish, when he shall be condemned to death, hung on the cross, and finally buried. he gives them early information and warning that the ignominy of his death is no obstruction to his glory. For this purpose he employs a most appropriate comparison.