Colossians 2:6

Therefore, as you received Christ Jesus the Lord, so walk in him,

-Colossians 2:6

So far, Paul has began with a number of different things.  Paul greets them, then tells them of his thankfulness and prayer for them.  He goes on to talk about Christ, followed by Paul's own sufferings and desires for them.  Now Paul moves on to encourage them to "walk in him".  Paul reminds them that they are to "walk in him" "as you received Christ".  NLT puts it this way: "just as you accepted Christ Jesus as your Lord".  This is in direct opposition to the idea that after accepting Christ there is a decrease in the efforts or emotions in following him.  Perhaps I didn't word that very well... Paul is saying that the way in which you walk in him is similar to the way in which you first "received Christ".  Unfortunately, many people are deceived into thinking otherwise.  They may go on their lives in a different way or a different direction.  If you think about it, it's actually pretty strange.  I heard one friend give an analogy of a person who claims to be on a sports teams, but in actuality never shows up to practices, never plays the sport and never even sees the coach or other players.  Yet, in spite of this, the person will maintain that he or she is still on the team and part of the team.  Perhaps this is like someone who does not walk in Christ in the same way as he or she received Christ.  Perhaps I am stretching here a bit, so someone will have to come rebuke me if that is the case.  However, this reminds me of something similar that Paul addresses in Galatians.

O foolish Galatians! Who has bewitched you? It was before your eyes that Jesus Christ was publicly portrayed as crucified. Let me ask you only this: Did you receive the Spirit by works of the law or by hearing with faith? Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?

-Galatians 3:1-3

The Galatians are doing something wrong here.  They should know that the way one receives the Spirit is by hearing with faith.  However, they are continuing by being perfected by the flesh and not the Spirit.  There is a disconnect and somewhere along the way they have been deceived.

Let us walk in him as we have received Christ.  Continue in that way on that path.  There is no waning or diminishing.  Keep on going and walk in him.