People wonder why we die. The Biblical answer is disobedience. Over and over again Adam is equated with the man that brought death into the world. “Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all men, because all sinned” Romans 5:12. The “one man” referred to here is Adam, and through his sin death entered the world. The disobedience of Adam was in the Garden of Eden, when he and Eve decided to be like God, desired to know what God knows when they were forbidden to do so.
So sin brought death and though this seems bleak that all that sin shall die, for we shall sin, but there is hope. “For if, by the trespass of one man, death reigned through that one man, how much more will those who receive God’s abundant provision of grace and of the gift of righteousness reign in life through the one man, Jesus Christ” Romans 5:17. Adam brought death into the world, and our salvation is in the death of another who never sinned, Jesus Christ. Through Christ, life is given to the sinners. The sin is taken away from the sinner and life is given, eternally in the graces of God. By saying “provision” and “gift” we know that these two things have to be accepted by us, by sinners. Eternal life is a free gift, the price paid, and the provision waiting. This is where the hope of Christianity shines in the face of death.
There are plenty of Scripture showing this. “For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord” Romans 6:23 and “The sting of death is sin, and the power of sin is the law. But thanks be to God! He gives us victory through our Lord Jesus Christ.” 1Corinthians 15:56 and “But Christ has indeed been raised from the dead, the first fruits of those who have fallen asleep. For since death came through a man, the resurrection of the dead comes also through a man. For as in Adam all die, so in Christ all will be made alive” 1Corinthians 15:20-22.