Paul's letter to the Colossians is pretty short; just four chapters. Paul wrote to these guys because they were falling off the Jesus bandwagon and starting to follow some Gnostic teachings, like angel worship. Paul reminds them that whatever they do, the Colossians should act for God, and not to impress others.
"And whatsoever ye do, do it heartily, as to the Lord, and not unto men; Knowing that of the Lord ye shall receive the reward of the inheritance: for ye serve the Lord Christ." -- Colossians 3:23-24
**NEXT: I & II Thessalonians