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Birds are naturally attracted to the taste of the mustard seed. Matthew identifies the birds of the air as "the wicked one" (Matthew 13:4, 19). Mark connects them with "Satan" (Mark 4:4, 15), and Luke links them to "the devil" (Luke 8:5, 12). In Genesis 15:11, fowls swoop down on Abraham's sacrifices, and he has to drive them away (see Deuteronomy 28:26). The end-time Babylon becomes "a habitation of demons, a prison for every foul spirit, and a cage for every unclean and hated bird" (Revelation 18:2).
In the parable, Jesus predicts the birds of the air would lodge in the branches. These "birds," demons led by "the prince of the power of the air" (Ephesians 2:2), have continually tried to infiltrate the church. Upon the unsuspecting early church, Satan moved quickly to implant his agents in it to teach false doctrine while appearing to be true Christians. Just as God permitted Satan to tempt Job intensely (Job 1:12; 2:6) and to sift Peter as wheat (Luke 22:31), He has allowed antichrists to lodge within His church (I Corinthians 11:18-19).
Martin G. Collins
Parables of Matthew 13 (Part Four): The Parable of the Mustard Seed