We live in a fallen world. Adam and Eve sinned, which started the whole world rolling downhill.
For example, my illness is an example of a genetic mutation. The sun's radiation and other things can damage our DNA. It literally breaks genes into pieces. Sometimes those mutuations are fatal, and that is the end. Sometimes the mutations are more subtle, or recessive. So it may not show up for generations. Things like sickle cell anemia or Down's comes to mind. You need to have two people with the recessive gene, and randomly, it is expressed.
I have heard before the flood, there was a canopy of water that protected the earth from excessive radiation. Perhaps that canopy came down, leading to more damage in the bodies of the people who lived then. I'm reading the Books of Moses right now. Reading the genealogies, the life expectancy goes down from a high with Methusaleh of over 900 years. By the time if Abraham something had happened, and he was considered to have lived a long life, dying at age 175. Certainly much longer than today, even with medical help! Accumulated damage obviously was a problem.
I always find it interesting that incest initially was not forbidden by God initially. Abraham married his half sister. Jacob and Isaac also married into the same family, and no apparent mutations. Then suddenly, the Exodus, and God forbids incest. Today, even cousins or second cousins can produce children with terrible expressed recessive mutations. I worked with disabled children in a greenhouse one summer. Two boys had massive facial deformities, and retardation, the parents were 2nd cousins. Three of their
Five children were like this. My MIL came from German villages in the Ukraine. She said the rule was never marry from your own village, and better to marrry a Jew, than a German. In fact, my husband's great grandmother was a Jew, a reflection of trying to allow more diverse genes into the gene pool.
Then there are those pesky sex linked diseases, a result of the inferior Y chromosome. So colour blindness, hemophilia, and diseases like that. Then there are autoimmune diseases like Rheumatoid Arthritis. I have a family history, but I certainly never expected to get it. I was serving God when it struck. I ate extremely well, organic, grow it myself, prepare everything from scratch. Lots of exercise and country living. So not lifestyle, although something certainly triggered it. But the gene was already there.
Then there was my cousin, who got severe RA at age 11/2! Who sinned, Sandra or her parents? Oh, neither!! She got it from both sides - both her grandmothers had it. So, in retrospect, I didn't get it till I was 44! So many good years, a husband, 4 children, my cousin got none of those things. She needs 24/7 care!
I went through great suffering, and depression in the early years of RA. Nothing like seeing your life stolen away to make you want to end it all. But God was totally in control! He didn't cause my disease, neither did Satan, sin, or lifestyle. Just a nasty result of the Fall, and probably the Flood.
I can now honestly praise God for my illness. It was life changing, and God used it for his glory to transform me! Because God uses ALL things together for good!
"And we know that God causes all things to work together for good to those who love God, to those who are called according to His purpose." Romans 8:28
Further, the Bible is clear that suffering is transformational.
"More than that, we rejoice in our suffering, knowing that suffering produces endurance, and endurance produces character and character produces hope. And hope does not disappoint, because God's love has been poured out through the Holy Spirit who was given to us." Romans 5:3-5
This whole Word Faith lie of perfect healing is such a lie from the devil! Certainly, the people living in the 1st century had no expectations of perfect healing. But when they heard that Jesus, the Messiah healed, they raced to see him. Some were looking for signs and wonders. Some were desperate for healing. While others, just wanted to mset the Messiah. This was Jesus ministry, to confirm what was spoken in the prophets!
The worst thing in my life was the condemnation and judgment of 2 Word Faith friends, because I was sick, who were so wrong in their interpretation of the Bible. Then when one claimed healing and died when her breast cancer metastasized, because she refused treatment, I was sad for her, but somewhat vindicated before God. Breast cancer is often related to a faulty gene. Not sin, not lifestyle, not Satan. Just the result of living in a fallen world, far from the perfect creation in these last days!