Why did Jesus have to be lifted up on the cross?

The act of Jesus being 'lifted up' on the cross serves multiple theological purposes. It signifies the fulfillment of God's redemptive plan, as foretold in Scripture, including references to Numbers 21:8-9, where Moses lifted the serpent for healing. In John 12:32, Jesus connects His crucifixion with drawing all people to Himself, demonstrating that His death is integral to salvation. This act not only showcases the love and grace of God but also serves to glorify Him, underscoring the magnitude of Christ's sacrifice as the mechanism through which believers are reconciled with God.