The first half of Galatians 2 continues Paul's bona fides as an apostle of Jesus. He had confirmed with the most important leaders of the early church that Gentiles were not required to adopt Jewish customs in order to obey God -- in fact, they should not do so.

by explaining that Paul recounted his conversion and initial missionary journeys. He also explained that salvation was not in the law of Moses, but rather we are forgiven, or justified, through faith in Jesus Christ.

Pauls final instructions to corrinth 

Colossians 3 Pau talks about how we should put our old self aside and be a new creation!

Paul wrote his Epistle to the Colossians because of a report that they were falling into serious error. False teachings and practices in Colossae were influencing the Saints there and threatening their faith.