Romans 5:12 says that death spread to all men, and James 1:15 says that sin brings forth death. It is not morbid or negative to address our problem with death. It is on us, and in us, creeping death, a necrosis that works contrary to any principle of life that we presently enjoy and that we like to assume will go on for a good, long time.
Death signals the vanquishing of life. It readily fills the void where life used to be, and moreover, seeks to take over. It involves disintegration of what once used to be united in peace and harmony, and then turns foul as decay sets in. It is not hard to see how death is an apt description not only of biological deterioration, but also of mental, emotional, and relational distress and disintegration. Death shows itself in the breakdown between humans and God, between humans and humans, and between humans and their very own selves.
A most unattractive image presents itself to us. Here we are, redeemed and forgiven. And yet, we still fight the battle with sin and death. It is as though there are remnants of rotting flesh attached to our bodies and our lives, in our minds and on our tongues, stinking up the works and driving out any notion that there might be something good and positive going on. All these remnants of the old life left over from life lived in fellowship with the old, Adamic man are to be nailed to the Cross in the death of Christ. But somehow, we keep stealing back shreds of the sinful self, as though they were or could be beautiful or valuable.
There is a principle of life that must win out, produced by the Spirit as we cling to Christ and as we allow our sin to be firmly nailed to His Cross, released from our hands and our hearts, which now are ready to receive and treasure God's good grace and gifts.