But not as the trespass, thus also is the gracious gift. For since by the trespass of the one [man] the many died, how much more the grace from God and the gift by grace by the one man Jesus Christ abounds unto the many (Romans 5:15).
Adam’s sin brought physical death upon all. His trespass introduced a different type of death to his descendants—separation from God. Therefore, all humans are born spiritually separated from God. The spirit is the rational center of a man; hence, when he seeks to discern things apart from God and truth—seeking his own truth—his reasoning becomes darkened because of the foolishness of his heart, resulting in a mind that is unapproved (Romans 1:21, 28).
However, the gracious gift, which is eternal life, counters this death, for the one who has the Son has eternal life and is thereby connected to God in his spirit (1 Corinthians 6:17; 1 John 5:12). This grace, along with the gift of righteousness, results in the removal of condemnation from the believer and restores him within his rational center to a relationship with God, so that his mind can now stand approved when tested, for he is able to discern spiritual things (1 Corinthians 2:15).
In Christ, we are given both a gracious gift and the gift of righteousness. The gift of righteousness removes condemnation, making us righteous before God because He imputes Christ’s death for sin and His resurrection to the believer, so that he is able to walk in newness of life. The gracious gift is eternal life. The grace believer now possesses a quality of the life of God and therefore possesses all things pertaining to life and godliness.