(there will be my opinion so separate it from the Scriptures )
1Therefore being justified by faith, we have peace with God through our Lord Jesus Christ:
(regained relatonship with God through his Son by believing in him)
2 By whom also we have access by faith into this grace wherein we stand, and rejoice in hope of the glory of God.
(We were forgiven by faith and it was God's grace which means not by works , we can now glorify God meaning we can finally worship him in truth and in our happiness )
3 And not only
so, but we glory in tribulations also: knowing that tribulation worketh patience;
( not only in our happiness but by suffering for him also being tested and growing our patience )
4 And patience, experience; and experience, hope:
(by gaining patience we gain experience and with that we gain hope )
5 And hope maketh not ashamed; because the love of God is shed abroad in our hearts by the Holy Ghost which is given unto us.
(we are not ashemed hoping for resurrection because we have Holy Ghost which was given by faith in shed Christ blood )
6 For when we were yet without strength, in due time Christ died for the ungodly.
(when we were dead he died for our tresspasses )
7 For scarcely for a righteous man will one die: yet peradventure for a good man some would even dare to die.
(for somebody who is worthy of dying for person could wish to die , even for some people which work good in world would some sacrifice themselfes)
8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.
(but God did not look to die for somebody worthy , Christ loved us to die for these who did not deserve )
9 Much more then, being now justified by his blood, we shall be saved from wrath through him.
(we are made clean from sin by his blood , we are saved from God's judgement)
10 For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life.
(We were enemies because God could not have us sinners in his presence , had restores our relationship with him because he put his anger on his own Son instead of us so we could be seen blameless in his sight )
11 And not only
so, but we also joy in God through our Lord Jesus Christ, by whom we have now received the atonement.
( we show our happines in God by receiving his atonement which was Christ )
12 Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:
(Because of Adam sin we all sinned and earn wage of death )
13 (For until the law sin was in the world: but sin is not imputed when there is no law.
(Sin was before the Law of Moses , but is not imputed when the payment for it is fulfilled by fulfilling the law)
14 Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam's transgression, who is the figure of him that was to come.
(we all inherit sin from Adam to Moses , even before the law , even these who did not transgress like Adam , Christ was representing Adam who would reconsile)
15 But not as the offence, so also
is the free gift. For if through the offence of one many be dead, much more the grace of God, and the gift by grace,
which is by one man, Jesus Christ, hath abounded unto many.
(Because of one man sin , one man can pay the penalty for sin so everybody can be reconsiled by grace through Jesus Christ )
16 And not as
it was by one that sinned,
so is the gift: for the judgment
was by one to condemnation, but the free gift
is of many offences unto justification.
( The sin of one was paid by gift of one , because of Adam's one sin we would be judged for all our sins but free gift is enought to take away all of them )
17 For if by one man's offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.)
(Because of Adam sin we all inherit death and sin , but grace through gift of sinless Christ will reconsile and give us eternal life )
18 Therefore as by the offence of one
judgment came upon all men to condemnation; even so by the righteousness of one
the free gift came upon all men unto justification of life.
(Because of Sin of one we were had God's wrath upon us , but by one sinless we all gained free gift and are made without sin to get life )
19 For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.
(Because Adam wilfully decided to disobey and we all sin because of him , so by one who decided to pay the price we are blameles in God's eyes )
20 Moreover the law entered, that the offence might abound. But where sin abounded, grace did much more abound:
(Law required sin to be punished , but grace is stronger and make the sin of no effect )
21 That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord.
(Sin gives death , but grace through Jesus Christ gives us his righteoussness so we can life forever )
Well most of these verses are speaking all about the same you could sum up the whole chapter in 4-5 verses . The sin from Adam is the curse that he brough upon us and overall the death of not only humans but whole creation is falling apart and Christ came to restore not only relationship but everything , the whole creation .