Colossians 2:9-10

For in him the whole fullness of deity dwells bodily, and you have been filled in him, who is the head of all rule and authority.

-Colossians 2:9-10

Paul warns his readers against being taken "captive by philosophy and empty deceit".  These kinds of things are "not according to Christ".  Paul goes on to say what he says in verse 9 and 10.  Paul points to the fullness of deity in Christ and how they have been "filled in him".  I'm not entirely sure of what Paul's logic is, but I'll try to take a stab at it.  He seems to be pointing them towards who Christ is and has always been to them.  With regard these things Paul is saying about Christ, they should remember them.  These are probably reasons why walking in him and being rooted in him will keep them from being taken "captive by philosophy and empty deceit".  It says, "in him the whole fullness of deity dwells bodily, and you have been filled in him".  If we have been filled in him and the whole fullness of deity is in him, why would we be taken captive by what is empty?  He is "the head of all rule and authority".  So, he rules over that which might take you captive.  But you have been filled in him, so why would you be taken captive by anything?  If he is the head of all, he cannot be under or taken captive by anything.  He who cannot be taken captive is who you have been filled in.  Why would you be taken captive?  Perhaps that's a bit circular or redundant or repetitive.  Unfortunately, I can get that way sometimes.  Regardless, let us remember who he is and who we are filled in as to not be taken captive and to walk in him.