“Notice how God is both kind and severe. He is severe toward those who disobeyed, but kind to you if you continue to trust in his kindness. But if you stop trusting, you also will be cut off. And if the people of Israel turn from their unbelief, they will be grafted in again, for God has the power to graft them back into the tree. You, by nature, were a branch cut from a wild olive tree. So if God was willing to do something contrary to nature by grafting you into his cultivated tree, he will be far more eager to graft the original branches back into the tree where they belong.” Romans 11:22-24
We must continue in our walk with God. We must do as John 15 tells us, we must abide in Jesus. This verse can be a warning that we can fall away from our walk with Jesus. We are grafted into the olive tree which is Jesus. If we don’t continue in our abiding, we will be cut off. There is no security in the bond of the gospel apart from abiding.
What a miracle it was that God took wild branches and grafted them into a cultivated olive tree to grow together as one. This transformation is what happens when we come to Christ. This means that anyone who belongs to Christ has become a new person. The old life is gone; a new life has begun! (2 Corinthians 5:17). What we were previously is gone and what we are now is what Christ is. “For God made Christ, who never sinned, to be the offering for our sin, so that we could be made right with God through Christ.” (2 Corinthians 5:21). Our new identity is the same as Christ’s identity, God looks and sees us as holy, righteous and free because that is what Christ is.
If we who were Gentiles by birth can experience this miraculous thing, then it only makes sense that Israel can also experience this new birth. Right now Israel as a whole has not accepted Jesus as their Messiah. However, Paul said that if they do not persist in clinging to their unbelief concerning him, they too will be grafted into the vine. Once they realize that Jesus is the savior then God is able to include them once again into the promise spoken to Abraham. They too will be counted as children of God through faith in Christ.