Charles Spurgeon Commentary John 3:15

"that whosoever believeth may in him have eternal life." — John 3:15 (ASV)

And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up: that whosoever believeth in him should not perish, but have eternal life.

You must be born into a new life if you are to be saved; how are you to have that great blessing? There is life for a look at Jesus Christ lifted up upon the cross, and lifted up in the preaching of the gospel. Look to him, then; and as surely as those who were bitten by the serpents in the wilderness were healed the moment that they looked at the serpent of brass, so surely shall every son or daughter of Adam, who gives a faith-look at the crucified Saviour, be saved at once and forever.