We may not be people who believe that the grace of God is a license to sin but we might easily slip into the belief that the grace of God grants us a free ride.  After all, if Jesus has done everything for me why do I need to do anything at all?  Peter knows that spiritual laziness is a pathway to licentiousness.  So, Peter continues with his encouraging message by challenging us to make every effort to grow up in Christ because we have been empowered, transformed, and freed by his grace.  He reminds us that we must cultivate our character and confirm our calling in Christ.