Romans 12:1-2 is crucial because it is located between what God has done for us and how we should respond. We honestly must let God's truth reshape our thinking.
"I urge you, brothers and sisters, in view of God's mercy, to offer you bodies as a living sacrifice, holy and pleasing to God -- This is your true and proper worship. Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is -- His good, pleasing and perfect will." - Romans 12:1-2
GO DEEPER: Titus 3:1-8