In this chapter, Paul is dealing with the issue of the impact of the law in us. We might think that the law would help us to do the right thing, but due to our sinful nature the opposite happens. When we are told about a law, a restriction , or a boundary, we seem compelled to rebel against it. This is something inside each of us. No parent recalls the day they taught their two year old to to be self-centered and rebellious, yet that characteristic is there. It is not taught. It is just there.
Have you noticed that rebellious streak in you? We rebel against any boundary that affects us, even when we know it is for our own good. Throughout this day, try to observe the moments when you desire to do something just because someone told you you could not.
Romans 7:21-25 NLT
I have discovered this principle of life-that when I want to do what is right, I inevitably do what is wrong.  I love God’s law with all my heart.  But there is another power within me that is at war with my mind. This power makes me a slave to the sin that is still within me.  Oh, what a miserable person I am! Who will free me from this life that is dominated by sin and death?  Thank God! The answer is in Jesus Christ our Lord. So you see how it is: In my mind I really want to obey God’s law, but because of my sinful nature I am a slave to sin.