Why is Christ being lifted up important for salvation?

The sermon asserts that Christ's being lifted up, as referenced in John 3:14-15 and beautifully paralleled with Moses lifting the serpent in the wilderness, signifies His exaltation through crucifixion and subsequent resurrection. This act is vital as it fulfills God's redemptive plan, providing the means by which salvation is offered to those who believe. Without His sacrificial act being completed, no one could be saved. Thus, His being lifted up on the cross is essential, as is His resurrection and ascension, as they together confirm His role as Savior.