Rom7,7 What shall we say, then? Is the law sin? Certainly not! Indeed I would not have known what sin was except through the law. > This is maybe why Jesus sais no one is good except God. We would not know what is good without the law!For I would not have known what coveting really was if the law had not said, Do not covet. > crazy to see how we are -
8 But sin, seizing the opportunity afforded by the commandment, produced in me every kind of covetous desire. For apart from law, sin is dead(denn ohne Gesetz ist die Sünde tot. ). 
9 Once I was alive apart from law; but when the commandment came, sin sprang to life and I died. > Sin sprang to life and i died < 
10 I found that the very commandment that was intended to bring life actually brought death.
11 For sin, seizing the opportunity afforded by the commandment, deceived me, and through the commandment put me to death(11 Denn die Sünde ergriff durch das Gebot die Gelegenheit, täuschte mich und tötete mich durch dasselbe. ). > Sin deceived me!
12 So then, the law is holy, and the commandment is holy, righteous and good.
13 Did that which is good, then, become death to me? By no means! But in order that sin might be recognised as sin, it produced death in me through what was good, so that through the commandment sin might become utterly sinful.(13 Ist nun das Gute mir zum Tod geworden? Auf keinen Fall! Sondern die Sünde, damit sie als Sünde erschiene, indem sie durch das Gute mir den Tod bewirkte, damit die Sünde überaus sündig würde durch das Gebot.)
14 We know that the law is spiritual; but I am unspiritual, sold as a slave to sin. > i guess, this is before baptism. After that i am set free 
15 I do not understand what I do. > ... For what I want to do I do not do, but what I hate I do. > ... Was that before Paul was baptized?
16 And if I do what I do not want to do, I agree that the law is good.
17 As it is, it is no longer I myself who do it, but it is sin living in me. > As if i am not free - as if it just comes over me! And i can't do anything against it! 
18 I know that nothing good lives in me, that is, in my sinful nature. For I have the desire to do what is good, but I cannot carry it out. > I know - i am not the first one who is asking if Paul life's like this or if he shares about a past he had. It also could be that his messerments are just so very different! 
19 For what I do is not the good I want to do; no, the evil I do not want to do- this I keep on doing.
20 Now if I do what I do not want to do, it is no longer I who do it, but it is sin living in me that does it.  > This sounds like i am not responsible. The sin is responsible ...
21 So I find this law at work: When I want to do good, evil is right there with me.
22 For in my inner being I delight in God's law; > yes - i do too. 
23 but I see another law at work in the members of my body, waging war against the law of my mind and making me a prisoner of the law of sin at work within my members. > yes - i can feel exactly like this: A WAR AGAINST THE LAW OF MY MIND. / A PRISONER OF THE LAW OF SIN AT WORK WITHIN ME
24 What a wretched man I am! > I think he really shares about present time - he just see's the opportunity always to be more exactly like Jesus.  Who will rescue me from this body of death? > I COULD DICTATE THIS SO EXACTLY!
25 Thanks be to God- through Jesus Christ our Lord! So then, I myself in my mind am a slave to God's law, but in the sinful nature a slave to the law of sin. > Still and always have to grow out of sin - more and more!

Paul is struggling
I am struggling for sure
Why be discouraged!
Just move on! struggle better next time!
Struggling is OK - giving up is noway!