“Do not marvel that I said to you, ‘You must be born again.’” (John 3:7)
When Jesus declared that we should not marvel because He told us we must be born again, He meant that we should not marvel as if the new birth were unnecessary. Jesus explained that flesh gives birth to flesh and only the Spirit gives birth to spiritual people. When the Bible uses the word, “flesh,” it means “Human nature unaided by God.” History tells us human nature unaided by God is a monster. So, Jesus said we should marvel not as if the new birth were unnecessary.
Jesus also told us we should not marvel as if the new birth were impossible. God can work a miracle of creation in the life of a human being. David prayed: “Create in me a pure heart, O God…” (Psalm 51:10). The apostles refer to the new birth as if it were the answer to David’s prayer (2 Corinthians 5:17).
We should not marvel as if the new birth were incomprehensible. We do not see electricity. But we believe in electricity because we see the effects of electricity. When we see trees bending and objects flying we say, “Look at that wind!” But we do not see the wind. We only see the effects of the wind. It is that way with the new birth. We cannot see the Spirit. We only see the effects of the Spirit in the life of someone who is being born again. But as we believe in other things we cannot see – like the wind and electricity – we can believe in the new birth.
And finally, Jesus meant you should not marvel as if the new birth could not happen to you.
Believe Jesus and it will happen to you!
4SpiritualSecrets 
I enjoy your posts Pastor Woodward. Keep them coming. They are always uplifting and educational. Thank you!
This is such a profound thought…I was just in this passage this morning and was struck when Jesus said that flesh can only give birth fo flesh…the new birth is essential for spiritual life! Thanks, Dick
Rob Smith