For if you were cut out of the olive tree which is wild by nature, and were grafted contrary to nature into a good olive tree: how much more shall these, who are the natural branches, be grafted into their own olive tree?
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Ambrosiaster
AD 400
The olive tree represents faith, whereas the wild olive refers to wickedness. Commentary on Paul’s Epistles.
If faith could do what was contrary to nature, how much more will it be able to accomplish that which is according to nature. For if the Gentile, who was cut off from his natural fathers and came, contrary to nature, to Abraham, how much more will God be able to recover his own! Homilies on Romans