Why do we sin today?
The greatest creature God ever made, Day Star (nicknamed Lucifer) fell in heaven and took 1/3 of all the angels in his rebellion against God. He then waited for the right time and showed up one day in the garden to deceive Eve, Adam participated in the same sin willingly. It is Adam that is primarily blamed because he was nearby when this took place and did nothing to stop it. God warned Adam about eating from the one tree that was off limits, He told Adam that he would die in the day that he disobeyed. So he did not go into this act blindly. Paul writes that
“the serpent deceived Eve by his craftiness”(2 Cor. 11:3), “Adam was not deceived, but the woman being deceived, fell into transgression.’(1 Tim. 2:14)
The Bible explains that we no need to be deceived to sin because we have inherited the fallen nature of Adam. Why is it of Adam? Only Adam became a sinner by sinning. We are all born with a built-in death warrant, which is our sin nature, inheriting this sin nature, which brings illness, it brings flaws. We inherit our physical features and even hereditary defects from our line, why is it so difficult to believe that our sinful nature could be passed on as well? Scripture states “The wages of sin is death.” This explains why a child can die even when they are innocent of doing anything intentionally wrong, or consciously sin? They die before they have had a chance to willfully disobey because death is the consequence of sin. Sin is in humanity before we formulize what is right and right.
Romans 5:12 “Therefore, just as through one man sin entered the world, and death through sin, and thus death spread to all men, because all sinned” The result came from the sin of Adam. Humanity was infected and it produced death and made everyone sin.
Jesus himself explains that with the sin comes the sentence of condemnation, "He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God.” (Jn. 3:18)
Jesus gives us all the way out, “For what the law could not do in that it was weak through the flesh, God did by sending His own Son in the likeness of sinful flesh, on account of sin: He condemned sin in the flesh” (Rom. 8:3)
A.T. Robertson explains “For that all sinned ef' (NT:1884) hoo (NT:3691) pantes (NT:3909) heemarton (NT:261). Constative (summary) aorist active indicative of hamartanoo (NT:261), gathering up in this one tense the history of the race (committed sin). The transmission from Adam became facts of experience. In the old Greek ef' (NT:1884) hoo (NT:3691) usually meant "on condition that," but "because" in the New Testament (Robertson, Grammar, p. 963) (from Robertson's Word Pictures in the New Testament).
Romans 5:12 Passed upon dieelthen (NT:1317) ef' (NT:1884). Literally, "came throughout upon." The preposition dia (NT:1211) denotes "spreading, propagation," as eis (NT:1500) "into" denoted "entrance."
(from Vincent's Word Studies of the New Testament).
Romans 5:18 - 19 says, “through one man’s trespass, judgment came to all men, for by one man’s disobedience all were made sinners.” This Scripture clearly shows sin is inherited through Adam’s disobedience, not ours. According to Rom.5 If one man (Adam) made us all sinners, it is also by one man (Jesus Christ) that can make us all righteous (those who believe). While we did not have a choice with sin -- we do have a choice to be in right standing with God through the righteousness of Christ and have the power to restrain from sin.
If one takes the position that we are not born sinners but only sin takes place by a choice then it means that everyone is born innocent (perfect), just like Jesus, without ever having a virgin birth. Paul writes that Sin entered the world through one man (Rom. 5:12-21), Adam. The term Original sin means Adam losing his original righteousness he was made with and passing it on to his offspring.
Paul’s point is that Adam’s sin was a single representative act for all his posterity, which is now reckoned to their account having sinned in him. Adam, as the first man was the natural headship of the human race. From him flows man’s fallen nature, passed on through reproduction. The sin nature affects the immaterial part of man, which is expressed by our outward actions. We sin because we have the nature of sin in us.
It is not just our physical actions that make us a sinner, but our mind is affected also. Sin shows its outworkings through our actions (Ps. 58; Job 15:14, 25:4; Eph. 2:3; Rom. 5:12-19), though we cannot see sin express itself all the time, it is still there waiting to be alive. Like a piece of firewood ready to be kindled by a small flame.
James explains how sin is birthed. Jm.1:14-15 “but each one is tempted when, by his own evil desire, he is dragged away and enticed. Then, after desire has conceived, it gives birth to sin; and sin, when it is full-grown, gives birth to death.” The source of sin doesn’t come from the outside but from within, it is the temptation to sin that comes from outside and brings life to what is already there. We are drawn away from our own desires (the Greek means to be lured into a trap). It is not a single act, but a process that begins in our heart.
This sin nature is the basis for all sinful acts and habits, everything we do wrong. Many times we treat the symptoms but not the cause. King David claimed he was conceived in iniquity (Ps. 51:5). Meaning even he was not exempt from the inheritance of sin, it was there from the beginning of his life in the womb.
Religion with its rules and regulations try to control our fallen nature by conforming the outer man to do what is right. These same religions have us believe that we can then depend on our own works to merit right standing before God.
The Bible says, “The heart is deceitfully wicked out of which flow all kinds of evils.” Jesus said a similar thing to thoise who meticulously cleaned the outside
"But those things which proceed out of the mouth come from the heart, and they defile a man. "For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies. "These are the things which defile a man, but to eat with unwashed hands does not defile a man." (Matt 15:18-20)
Jesus points to the innermost being of man- his spirit. The only solution for cleansing is God’s solution - change the heart. How? By the new birth which takes place on the inside of man. Our dead spirit needs to be regenerated (Rom. 8:1; Gal. 5:24) by the Spirit of God. Once we are made alive, spiritually, we are able to have a vital relationship to God through Jesus Christ. God’s answer is a new nature, what Adam lost, we are given even more.
Those who believe on his sacrifice have his righteousness imputed to us and are continually changed by the sanctification process, by the Holy Spirit to counter the effects of sin.