You Gentiles are like branches of a wild olive tree that were made to be part of a cultivated olive tree. You have taken the place of some branches that were cut away from it. And because of this, you enjoy the blessings that come from being part of that cultivated tree.
That's true enough. But they were cut away because they did not have faith, and you are where you are because you do have faith. So don't be proud, but be afraid.
Now you see both how kind and how hard God can be. He was hard on those who fell, but he was kind to you. And he will keep on being kind to you, if you keep on trusting in his kindness. Otherwise, you will be cut away too.