The Bible says that all are born into Adam except Jesus. The Bible also says that all have sinned but Christ knew no sin nor did he commit any sin. He is our high priest who committed no sin.
One question that is asked by many is could have Jesus sinned while on earth. Did he have a sin nature like the rest of mankind? John Owen wrote:
He was the Lamb of God without spot and without blemish (1 Peter 1:19). He, as our high priest, "is holy, harmless, undefiled and separate from sinners" (Hebrews 7;26).
How could Christ take our nature and not the guilt and defilements of it? If Levi paid tithes in Abraham, how is it that Christ did not sin in the loins of Adam? (Hebrews 7:9, 10).
Christ was never legally represented by Adam, so was not liable to the imputation of Adam's sin. Had sin been imputed to Christ as a descendant of Adam, he would not been a fit high priest to have offered sacrifices for us, for he would not have been "separate from sinners" (Hebrews 7;26). Had Adam not sinned, Christ would not have incarnate. He would not have needed to be a Mediator for sinners. Therefore the moral necessity that Christ should be incarnate took place only after the fall. So Christ could not have been legally represented by Adam and so Adam's sin could not be imputed to him. Christ incarnate served God is a covenant of works in which he perfectly obeyed God without any sin. This he could not have done if Adam's sin had been imputed to him.
Neither did Christ inherit a polluted sinful nature from Adam. The substance of the virgin Mary from which Christ's human nature was made was sanctified by the Holy Spirit, so that the babe born was holy and undefiled (Galatians 4:4; Luke 1:35)...(Christ) "fulfilled all righteousness" (Matthew 3:15). His Father was always "well pleased" with him because of his perfect obedience.
Adam's sin was never imputed onto Christ. If that was the case, then we, as followers of Christ, could have been imputed the righteousness of Christ. The Apostle Paul, under the inspiration of the Holy Spirit, wrote:
For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God (2 Corinthians 5:21).