Old Testament

God wants us to live long normal, happy, peaceful, healthy abundant lives. After all, Jesus said in John 10:10: ... I came that they may have life, and have it abundantly. It is also God’s will that we live long lives free of sickness and when our bodies grow old and give out, we would die and return to the same dust from which we were formed.

... You take away their breath, they die and return to their dust.

Psalm 104:29

With long life I will satisfy him, and show him my salvation.

Psalm 91:16

God wanted us to lead a healthy, carefree life in His presence. But, through the sin of Adam and Eve sin and sickness entered the human condition. Therefore, just as through one man sin entered into the world, and death through sin, and so death spread to all men, because all sinned.
(Romans 5:12)

Now we know that both Adam and Eve sinned in the garden, but Paul only mentions Adam in Romans 5:12. Paul only mentions Adam because men have seed, women do not. We inherit our sin nature through Adam, that is why Jesus had to be born of a virgin. He could not have a biological earthy father because if He did, He would have inherited the same sin nature we inherit from our fathers. For Jesus to be a perfect sacrifice for our sins and sicknesses, He had to be sinless and blameless.

The covenant of healing

If you will give earnest heed to the voice of the Lord your God, and do what is right in His sight, and give ear to His commandments, and keep all His statutes, I will put none of the diseases on you which I have put on the Egyptians; for I, the Lord, am your healer.

Exodus 15:26