Colossians 2 is about gaining the strength to face adversity. Our strength comes from two sources - think, substantial relationships with other people, and putting our roots down deep into Christ. He wants us to grow deep and wide. This enables us to face the adversity of our day. In this chapter, the adversity is empty philosophy and high-sounding nonsense and legalism. He says the rules may seem wise, but they don't have the power to help conquer your evil desires. So, grow deep and wide - with other people and with Christ.