The part of us that clings to sin is our flesh. But that is not who I am. I am living and dwelling inside a body made of flesh. I am limited to physical sight. I see perfectly with these eyes, but have to have faith that what I cannot see is there.
If I could keep the laws and commandments, Jesus would not have died. But none of us can truly keep them, though we try. He paid with his life for our sins past, present, and future.
Even the Apostle Paul admitted that he was always failing to keep God's laws, but thanks God that in Christ, there is forgiveness and a debt already paid:
Romans 7:18-21 (NLT)
18 And I know that nothing good lives in me, that is, in my sinful nature.[d] I want to do what is right, but I cant. 19 I want to do what is good, but I dont. I dont want to do what is wrong, but I do it anyway. 20 But if I do what I dont want to do, I am not really the one doing wrong; it is sin living in me that does it.
21 I have discovered this principle of lifethat when I want to do what is right, I inevitably do what is wrong. 22 I love Gods law with all my heart. 23 But there is another power[e] within me that is at war with my mind. This power makes me a slave to the sin that is still within me. 24 Oh, what a miserable person I am! Who will free me from this life that is dominated by sin and death? 25 Thank God! The answer is in Jesus Christ our Lord. So you see how it is: In my mind I really want to obey Gods law, but because of my sinful nature I am a slave to sin.