Sin is rejection of God and his ways (Rom. 3:10-18; 14:1-3). It came about by Adam and Eve giving in to Satan’s temptation and has become a part of human nature (Gen. 2:25, 3:1-7). Even though humans have an eternal desire for God wired into their being, sin distorts and confuses this desire, leading a person toward worship and allegiance to things other than God. The Bible calls this idolatry, and it is an abomination to God resulting in being subject to his wrath (Luke 16:15). The nature of sin is so corrupting that it is impossible for a person to avoid it on his own accord.
Sin has not only corrupted what God made good, but this includes our relationships with one another, and most significantly, our relationship with God (Ps. 53:1-3). The good world God created has been fractured by sin, and now all of God’s creation is internally yearning to be redeemed (Rom. 8:18-25). Sinfulness causes us to fall short of God’s glory (Rom. 3:9, 23). Because of this, we rightly deserve the full wrath of God because we have offended him (Eph. 2:1-3). If not for God’s grace intervening into our sin predicament, sin destines us for death.
Adam’s sin tainted all generations and now we are born as sinful people into a sinful world (Rom. 5:12; Gen. 2:16, 3:6). Even in infancy, we are guilty because they have this sin condition “built in” (Ps. 51:5) and it is only by God’s grace that he saves some from this condition.
Only Jesus, because he was conceived by the Holy Spirit and was fully God was capable of entering this world free of original sin, living a perfect life, and reversing the effects of sin (1 Cor. 15:21-22).