The word “firstborn” in Colossians 1:15 is not used in a literal term as in being born or created, but…
Paul was revealing to the church, who he is writing to, how they can recognize his letters. The reason why is because there were many false apostles in the time of Paul. See below.
Steal: Satan comes to steal you away from the truth of God’s Word. He will take the truth that you know and give you the wrong interpretation (Matthew 4:6). The devil first has to make you believe in a false Jesus, a false Holy Spirit, and in a false Gospel that cannot save.