Men either sin by choice or they sin by nature. If they sin by choice then their sin is their own responsibility, if they sin by nature then their sin is not their fault because they are simply acting in accord with their nature.
Jesus Christ was tempted in ALL POINTS as we are yet was without sin. Thus it is reasonable to conclude that temptation is connected to sin and the scriptures support this view (1Cor 10:13, Jam 1:14-15).
James taught that it was the lusts of the flesh which draw people into sin (Jam 1:14-15) and it can be clearly seen that Eve was drawn into eating the forbidden fruit through her own lusts (Gen 3;6).
Thus it is clearly evident that the draw to sin is via the lusts of the flesh.
Paul taught that we are slaves to whom we obey, whether sin unto death or obedience unto righteousness (Rom 6:16) thus illustrating two different paths.
When Jesus walked the earth Jesus was a slave of righteousness and thus yielded a life of obedience unto righteousness. Jesus denied Himself and picked up His cross. Jesus denied the lusts of His flesh and yielded to the Father's will.
Paul writes in Gal 5:24 that "those who are Christ's HAVE crucified the flesh with the passions and desires" and then go onto say in verse 25 that we ought to WALK in the Spirit.
Paul writes in Rom 8:2 that it is "the Spirit of life IN Jesus Christ that sets us free from the law of sin and death" and then goes on to say that "righteousness of the law might be fulfilled in us who walk not after the flesh but after the Spirit."
We see clearly these two different walks described by Paul.
One can either walk after the flesh yielding to the passions and desires of the flesh, that road leads to death.
Or
One can walk after the Spirit, bringing the body into subjection to the will of God.
One road requires one to deny themselves, pick up their cross and follow Jesus and the other road does not.
Jesus taught that whomsoever will lose their life for His sake will save it but those who save their life will lose it.
The question we all have to ask ourselves is which road are we on. Do we obey sin unto death (Rom 6:16) and are thus slaves of sin (Joh 8:34, Rom 6:16), or do we obey the doctrine once delivered (Rom 6:17) and are thus slaves of righteousness (Rom 6:18) which leads to holiness the end of which is eternal life.
Original Sin is taught in different ways by many people. There are those of the Reformed Tradition who hold to "Total Depravity." They teach that the sin of Adam corrupted his nature in such a way that this corruption was past down from generation to generation.
This view basically comes in two different flavour. One flavour holds sin to be an actual substance in the flesh that is literally passed down via the male sperm. This view is called Seminal Identity or the Natural Head Theory. The theological term for this view is Traducianism.
Teachers like John MacArthur hold the above view and that is why he will say things like this...
The Distinctive Qualities of the True Christian, Part 1
This was the view Augustine of Hippo held in the 4th century and it was the view he introduced into Church Orthodoxy through his prolific writings and personality. Augustine viewed all humanity as being in the loins of Adam and that when Adam sinned all humanity became infected with corruption and was also guilty.
An alternate view held by many theologians of the Reformed Tradition is that of the Federal Head view or Creationism. This view teaches that Adam was the representative of all men who violated a covenant with God and thus the seed of corruption is imparted to the soul at conception. This is probably the most commonly held view today.
It does not really matter which view one holds for they both teach that the reason men sin is not because of choice but due to birth nature.
Thus sin is no longer a crime but a disease.
When actual sin is the result of a disease and bondage to sin is from birth then it forces repentance to be taught as a confession of this diseased condition with an associated cry out for help.
On the other hand ff sin is actually rooted in a free choice of one choosing to yield to lust in an unlwaful manner then repentance is something very different indeed.
Anyway some food for thought. I will write more later, work calls.