1 Corinthians 5:1-8
Expel the Immoral Brother!
1It is actually reported that there is sexual immorality among you, and of a kind that does not occur even among pagans: A man has his father's wife. 2And you are proud! Shouldn't you rather have been filled with grief and have put out of your fellowship the man who did this? 3Even though I am not physically present, I am with you in spirit. And I have already passed judgment on the one who did this, just as if I were present. 4When you are assembled in the name of our Lord Jesus and I am with you in spirit, and the power of our Lord Jesus is present, 5hand this man over to Satan, so that the sinful nature[1] may be destroyed and his spirit saved on the day of the Lord.
Footnotes
5:5 Or that his body; or that the flesh
When I read this passage it seems like it makes it pretty clear that sin causes destruction / God's punishment. However... God will allow the physical body to be destroyed, but if that person is a believer his soul will still be saved? Am I understanding this correctly or am I missing something?
Another verse I was looking at as I was reading through 1 Corinthians is 1 Corinthians 3:10-15:
1 Corinthians 3
10By the grace God has given me, I laid a foundation as an expert builder, and someone else is building on it. But each one should be careful how he builds. 11For no one can lay any foundation other than the one already laid, which is Jesus Christ. 12If any man builds on this foundation using gold, silver, costly stones, wood, hay or straw, 13his work will be shown for what it is, because the Day will bring it to light. It will be revealed with fire, and the fire will test the quality of each man's work. 14If what he has built survives, he will receive his reward. 15If it is burned up, he will suffer loss; he himself will be saved, but only as one escaping through the flames.
Is this passage kind of along the same lines as 1 Corinthians 5:1-8 (above) ?
Sorry for all the questions... my brain has a hard time comprehending scripture sometimes. If someone else gets something different out of these passsages please share.

My next question is kinda long regard Romans 7:14-25 & Romans 8:1-17. When Paul is speaking in Romans 7:14-25 it sounds as though he struggles with sin alot (I can relate at times) however in the next chapter in verse 5 he starts talking about how if we are Christians we should not be controlled by the sinful nature anymore?
In verse 8:1-4 does this mean that the reason God sent his Son is because we are unable to live up to the law so he sent a Savior for us so that we would not have to live up to the expectations of the law because our flesh is too weak? In that case, since we are weak won't our flesh always be a slave to sin?
Romans 7
14We know that the law is spiritual; but I am unspiritual, sold as a slave to sin. 15I do not understand what I do. For what I want to do I do not do, but what I hate I do. 16And if I do what I do not want to do, I agree that the law is good. 17As it is, it is no longer I myself who do it, but it is sin living in me. 18I know that nothing good lives in me, that is, in my sinful nature.[1] For I have the desire to do what is good, but I cannot carry it out. 19For 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. 20Now 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.
21So I find this law at work: When I want to do good, evil is right there with me. 22For in my inner being I delight in God's law; 23but 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. 24What a wretched man I am! Who will rescue me from this body of death? 25Thanks 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.
Romans 8
Life Through the Spirit
1Therefore, there is now no condemnation for those who are in Christ Jesus,[1] 2because through Christ Jesus the law of the Spirit of life set me free from the law of sin and death. 3For what the law was powerless to do in that it was weakened by the sinful nature,[2] God did by sending his own Son in the likeness of sinful man to be a sin offering.[3] And so he condemned sin in sinful man,[4] 4in order that the righteous requirements of the law might be fully met in us, who do not live according to the sinful nature but according to the Spirit.
5Those who live according to the sinful nature have their minds set on what that nature desires; but those who live in accordance with the Spirit have their minds set on what the Spirit desires. 6The mind of sinful man[5] is death, but the mind controlled by the Spirit is life and peace; 7the sinful mind[6] is hostile to God. It does not submit to God's law, nor can it do so. 8Those controlled by the sinful nature cannot please God.
9You, however, are controlled not by the sinful nature but by the Spirit, if the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, he does not belong to Christ. 10But if Christ is in you, your body is dead because of sin, yet your spirit is alive because of righteousness. 11And if the Spirit of him who raised Jesus from the dead is living in you, he who raised Christ from the dead will also give life to your mortal bodies through his Spirit, who lives in you.
12Therefore, brothers, we have an obligation--but it is not to the sinful nature, to live according to it. 13For if you live according to the sinful nature, you will die; but if by the Spirit you put to death the misdeeds of the body, you will live, 14because those who are led by the Spirit of God are sons of God. 15For you did not receive a spirit that makes you a slave again to fear, but you received the Spirit of sonship.[7] And by him we cry, "Abba,[8] Father." 16The Spirit himself testifies with our spirit that we are God's children. 17Now if we are children, then we are heirs--heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory.
Footnotes
8:1 Some later manuscripts Jesus, who do not live according to the sinful nature but according to the Spirit,
8:3 Or the flesh; also in verses 4, 5, 8, 9, 12 and 13
8:3 Or man, for sin
8:3 Or in the flesh
8:6 Or mind set on the flesh
8:7 Or the mind set on the flesh
8:15 Or adoption
8:15 Aramaic for Father
Sorry for all the questions but I am truly trying to understand this. Thanks a bunch for any comments you can throw my way.
Amanda