Romans 7:23

7:23 But I see a different law in my members waging war against the law of my mind and making me captive to the law of sin that is in my members.

Romans 7:25

7:25 Thanks be to God through Jesus Christ our Lord! So then, I myself serve the law of God with my mind, but with my flesh I serve the law of sin.

Romans 12:2

12:2 Do not be conformed to this present world, but be transformed by the renewing of your mind, so that you may test and approve what is the will of God – what is good and well-pleasing and perfect.