Cross reference
Romans 11:24
24 For if thou wast cut out of that which is by nature a wild olive tree, and wast grafted contrary to nature into a good olive tree; how much more shall these, which are the natural `branches', be grafted into their own olive tree?
Romans 11:17-18
17 But if some of the branches were broken off, and thou, being a wild olive, wast grafted in among them, and didst become partaker with them of the root of the fatness of the olive tree;
18 glory not over the branches: but if thou gloriest, it is not thou that bearest the root, but the root thee.
Romans 11:30
30 For as ye in time past were disobedient to God, but now have obtained mercy by their disobedience,