Colossians 2:12-13

having been buried with him in baptism, in which you were also raised with him through faith in the powerful working of God, who raised him from the dead. 13 And you, who were dead in your trespasses and the uncircumcision of your flesh, God made alive together with him, having forgiven us all our trespasses,

-Colossians 2:12-13

Paul goes on to tell his readers about how they were "buried with him(Christ) in baptism".  Not only were they buried with him, but they "were also raised with him".  There's a lot that Paul gets to in this passage about the believer and their salvation and how Christ relates to that.  Perhaps the reason why Paul goes into detail about such things in this particular place is to show how much the believer is rooted in Christ.  A believer has been buried with Christ and has been raised with Christ.  He goes on to tell his readers in the next verse that for them, "God made alive together with him".  Believers are buried with Christ, they are raised with Christ and they are made alive with Christ.  Believers are connected with Christ.  To be separated from Christ would perhaps suggest that such things (buried, risen, alive) never took place.  We are told to walk in him and be rooted in him.  We need to be on guard against "philosophy and empty deceit" this is "not according to Christ".