In the twelfth chapter of John, Jesus is trying to prepare his disciples for his upcoming death. He explains that the work he was sent to do as the man Christ Jesus was coming to an end, and for that work to be fruitful, he must die (John 12:24).
He also tells them that he is a light that was sent into the world and was about to leave the world in darkness. But those who believe in him would not be in the dark but children of light (John 12:35-36).
In verse 32 Jesus speaks of being “lifted up.” This signified that he was to be hung on a cross. Remember Jesus’s words in John 3:14-15 (NKJV), “And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up, that whoever believes in Him should not perish but have eternal life.” Jesus was referencing the time when Moses put a copper serpent on a pole and lifted it up so that anyone who had been bitten by a serpent could look upon it and be cured. (Numbers 21:8-9)
How could the perfect man Jesus be symbolized by a serpent? 2 Corinthians 5:21 (CSB), “He (God) made the one who did not know sin to be sin (pictured by the serpent) for us, so that in him we might become the righteousness of God.” Thus, Jesus’s death on the cross would be enough to bring all of humanity unto him and to be a cure from the power of the serpent (Satan).
I believe that the point of the Hebrews that looked to the serpent on the pole that was raised in the center of the camp was to be cured if they have been bitten and so by raising Him up for all to look to thus believing in Him for them looking to Him for that reason is how we are saved.
The irony is that the Father has to draw us unto the Son per John 6:44 and to reveal His son to us per Matthew 11:25-27 and so our believing in Him is a manifested work of God per John 3:18-21.
John 6:44 No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day.
Matthew 11:25 At that time Jesus answered and said, I thank thee, O Father, Lord of heaven and earth, because thou hast hid these things from the wise and prudent, and hast revealed them unto babes. 26 Even so, Father: for so it seemed good in thy sight. 27 All things are delivered unto me of my Father: and no man knoweth the Son, but the Father; neither knoweth any man the Father, save the Son, and he to whomsoever the Son will reveal him.
John 3:18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
Colossians 1:20 And, having made peace through the blood of his cross, by him to reconcile all things unto himself; by him, I say, whether they be things in earth, or things in heaven. 21 And you, that were sometime alienated and enemies in your mind by wicked works, yet now hath he reconciled 22 In the body of his flesh through death, to present you holy and unblameable and unreproveable in his sight: 23 If ye continue in the faith grounded and settled, and be not moved away from the hope of the gospel, which ye have heard, and which was preached to every creature which is under heaven; whereof I Paul am made a minister;
Thanks for sharing as I agree that looking to Jesus Christ for eternal life by believing in Him which I give thanks to the Father in Jesus's name for my believing in Him.