Since behavior actually involves the whole being, notice the two aspects of our being that Paul focuses on:

1A.  First, THERE IS THE BODY (12.1)

1B.  First, there is an invitation
“I beseech you”

2B.  But there is an incentive to support the invitation

3B.  Third, there is an illustration
“a living sacrifice”

2A.  Then, THERE IS THE MIND (12.2)

1B.  First, there is the obstacle to renovation of your mind
“And be not conformed to this world”

2B.  Why obey Paul? Because of the objective of renovation
“but be ye transformed by the renewing of your mind”

3B.  The outcome of renovation, which has to do with the will of God