The term "mortal body" refers to the physical, perishable aspect of human existence, as contrasted with the spiritual or eternal nature of the soul. In Christian theology, the mortal body is subject to decay, suffering, and death due to the Fall of Man, as described in Genesis. The concept of the mortal body is significant in understanding the human condition, the effects of sin, and the hope of resurrection.

Biblical References:

1. Genesis 3:19 : "By the sweat of your brow you will eat your bread, until you return to the ground, because out of it were you taken; for dust you are, and to dust you shall return." This verse highlights the mortality of the human body as a consequence of sin, emphasizing the return to dust, symbolizing death and decay.

2. Romans 6:12 : "Therefore do not let sin reign in your mortal body so that you obey its desires." Here, the Apostle Paul addresses the struggle against sin within the mortal body, urging believers to resist sinful desires and live in righteousness.

3. Romans 8:11 : "And if the Spirit of Him who raised Jesus from the dead is living in you, He who raised Christ Jesus from the dead will also give life to your mortal bodies through His Spirit, who dwells within you." This passage offers hope for the mortal body, promising that the same Spirit that resurrected Jesus will also give life to believers' mortal bodies.

4. 1 Corinthians 15:53-54 : "For the perishable must be clothed with the imperishable, and the mortal with immortality. When the perishable has been clothed with the imperishable, and the mortal with immortality, then the saying that is written will come to pass: 'Death has been swallowed up in victory.'" Paul speaks of the transformation that will occur at the resurrection, when mortal bodies will be changed into immortal ones, signifying victory over death.

5. 2 Corinthians 4:11 : "For we who are alive are always consigned to death for Jesus’ sake, so that the life of Jesus may also be revealed in our mortal bodies." This verse reflects the paradox of Christian life, where believers experience the reality of mortality while simultaneously manifesting the life of Jesus through their mortal existence.

Theological Significance:

The concept of the mortal body is central to understanding the human experience in light of Christian doctrine. It underscores the reality of human frailty and the consequences of sin, while also pointing to the hope of redemption and resurrection. The mortal body is seen as a vessel through which believers can glorify God, despite its weaknesses and limitations.

The New Testament frequently contrasts the mortal body with the promise of a glorified, resurrected body. This future transformation is a cornerstone of Christian eschatology, providing assurance that death is not the final word for those in Christ. The resurrection of Jesus serves as the prototype and guarantee of this future hope, affirming that believers will one day experience a bodily resurrection, free from the corruption and mortality that characterize the present human condition.

In practical terms, the understanding of the mortal body influences Christian ethics and behavior. Believers are called to honor God with their bodies, recognizing them as temples of the Holy Spirit (1 Corinthians 6:19-20). This perspective encourages a life of holiness, self-control, and service, as the mortal body is seen as an instrument for God's purposes until the time of its transformation.