Theophylact of Bulgaria
Boaz fathered Obed through Ruth (Matthew 1:5). Though Ruth was a stranger in her land, she became the wife of Boaz. Similarly, the Church made up of Gentiles, having been an outsider to the covenants, turned away from her people, abandoned idolatry, and renounced her earthly father, the devil, to become united with the Son of God.