Commentaries:
In verses 11 through 14, Paul shows how Jesus Christ died to pay the penalty for our sins and now our past sins, brought about by conforming to the ways, practices, and philosophies of this world, are completely blotted out and nailed to His cross. He reminds them that Christ has completely conquered all of the evil spirits who continue to rule this present, evil world and who inspire the pagan philosophies that had so influenced the Colossian society: "Having disarmed principalities and powers, He made a public spectacle of them, triumphing over them in it" (verse 15).
Earl L. Henn
Are the Sabbath and Holy Days Done Away?
When Jesus Christ lived a perfect life and died for the sins of men, He qualified to dethrone Satan. The "ruler of this world" has been defeated! However, he remains active among us until the King of kings returns and sets up His government on earth.
Richard T. Ritenbaugh
Basic Doctrines: Satan's Origin and Destiny