"Him we preach, warning every human and teaching every human in all wisdom, that we may present every human perfect in Christ Jesus." (Colossians 1:28)
What was Paul "warning every human" about? And what was he teaching "every human in all wisdom"?In verses 19-21 Paul had said this about Jesus:
"For God was pleased to have all His fullness dwell in Him, and through Him to reconcile to Himself all things, whether things on earth or things in heaven, by making peace through His blood, shed on the cross. Once you were alienated from God and were enemies in your minds because of your evil behavior. But now He has reconciled you by Christ’s physical body through death to present you holy in His sight, without blemish and free from accusation" (Colossians 1:19-21)
Paul was teaching that God has reconciled "all things" to Himself through Christ Jesus. Paul was warning his listeners that it is immature (less than perfect) to teach or believe that Jesus would FAIL to do so.