"None of us liveth to himself, and no man dieth to himself. For whether we live, we live unto the Lord: and whether we die, we die unto the Lord: whether we live, therefore, or die, we are the Lord's." Romans 14:7-8
Colossians 2:6 As you have therefore received Christ, [even] Jesus the Lord, [so] walk (regulate your lives and conduct yourselves) in union with and conformity to Him.(Amp)
It is important that we grasp the concept of 'act according to your decision'. Have you made a decision to accept Jesus Chris as your Lord and Saviour? What have you decided, are you living for yourself or for Christ? We as Christians are called of the Father to live according to HIS desire for us. What is HIS desire for us? To walk in union and conformity to HIM. If we sing in union with someone, we sing in a way that would enhance the song; When we walk in union with the Father, we walk in a way that would display HIM to the world.
2Corinthians 3:2 [No] you yourselves are our letter of recommendation (our credentials), written in your hearts, to be known (perceived, recognized) and read by everybody.
3 You show and make obvious that you are a letter from Christ delivered by us, not written with ink but with [the] Spirit of [the] living God, not on tablets of stone but on tablets of human hearts. (Amp)
We must see that our actions and the example that we live be according to the Word.
Colossians 1:10 That you may walk (live and conduct yourselves) in a manner worthy of the Lord, fully pleasing to Him and desiring to please Him in all things, bearing fruit in every good work and steadily growing and increasing in and by the knowledge of God [with fuller, deeper, and clearer insight, acquaintance, and recognition]. (Amp)
The question that we must ask ourselves is: Am I acting and living in such a way that Christ Jesus is glorified or am I glorifying the flesh and my lust for the things I want?
Galatians 5:24 And those who belong to Christ Jesus (the Messiah) have crucified the flesh (the godless human nature) with its passions and appetites and desires. (Amp)
We are encouraged by the Word of God: I have strength for all things in Christ Who empowers me [I am ready for anything and equal to anything through Him Who infuses inner strength into me; I am self-sufficient in Christ's sufficiency]. Philippians 4:13 Amp