The phrase “This issue” is about making believers go back to the Law of Moses to observe it and keep it. See verse 3 and its commentary.
By Paul repeating it twice in verses 8 & 9 (see verse 8 and its commentary), shows the seriousness of the warning…
The Jehovah’s Witnesses claim or interpret the word “firstborn” as being created. The word could mean that, but it does have another meaning, like preeminence: to be the chief or have the first place. When we read a passage, it cannot be isolated from the rest of its context. The Jehovah’s Witnesses are notorious for this.
No other spiritual water can quench your thirst by giving you eternal life. Jesus is the only one who paid the price for your sins.
The word “firstborn” in Colossians 1:15 is not used in a literal term as in being born or created, but…
Works are the evidence of a regenerated person who has the Holy Spirit indwelling him already. Salvation is based upon faith in Jesus Christ and His sacrifice for you.
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.