Stimulated or Sluggish by Grace? (LD 1; COD 1; 13; Deuteronomy 7:7; 1 Peter 2:9)

Why do we want to conform to the Lord if we are already secured in Christ?  Do we want to conform to the Lord because it is better than facing the dread of not conforming to the Lord?   What is the primary motivation for our desire to conform to the Lord?  If you look at our confessions it seems that we do so because of what God has done or as we say, “Out of Gratitude.”  It seems that we obey the Lord because of His grace.  So, how can grace motivate us to conform to the Lord rather than just living selfishly in rebellion against Him?