Romans 11:17-21

However, some of the branches have been pruned away. And you, who were once nothing more than a wild olive branch, God has grafted in—inserting you among the remaining branches as a joint partner to share in the wonderful richness of the cultivated olive stem. So don’t be so arrogant as to believe that you are superior to the natural branches. There’s no reason to boast, for the new branches don’t support the root, but you owe your life to the root that supports you! You might begin to think that some branches were pruned or broken off just to make room for you. Yes, that’s true. They were removed because of their unbelief. But remember this: you are only attached by your faith. So don’t be presumptuous, but stand in awe and reverence. Since God didn’t spare the natural branches that fell into unbelief, perhaps he won’t spare you either!