John 3:14

This comparison of the serpent lifted up in the desert, upon which whoever looked was immediately cured from the bite of the fiery serpents, is a figure of the crucifixion of Christ on Calvary. And we remark, that our divine Saviour makes use of these words, the Son of man must be lifted up or exalted; ( exaltari) by which form of expression he would teach us, that he does not consider the cross as a disgrace, but as a glory; (Theophylactus and St. John Chrysostom) and moreover, that as the Israelites, bitten by the fiery serpents, were cured by looking upon the brazen serpent, so are Christians cured by looking up with an active faith, replete with love and confidence, on Jesus Christ crucified.