Those who walked with Christ in His ministry here on earth what were their fates? Prison for a few, Stephen was stoned to death. No we are not promised a healthy life here on earth. We are not promised not being persecuted. We are promised though He will never forsake us. As Daniel in the Lions Den as Daniels students in the furnace HE is there.
What about Timothy? He suffered with a stomach ailment or some chronic illness. Remember Paul's advice to him?
1 Timothy ch 5 v23Don’t drink only water. You ought to drink a little wine for the sake of your stomach because you are sick so often.
I've seen many persons in my lifetime who have become sick or lame. Some were healed others remain such. Why? That is GOD's business not ours. What you see as a sickness the person may not be able to overcome can rather be GOD's Power & Glory working through that persons very weakness.
I do wish persons would stop telling those who are Lame or sick that if they only have faith they will be healed. They forget "Thy Will Be Done". It even goes back to these scriptures really.
Matthew Ch 5 29So if your eye—even if it is your good eye£—causes you to lust, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell. 30And if your hand—even if it is your stronger hand£—causes you to sin, cut it off and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell.
Where is it stated the person will be given another hand or another eye here on this earth? The body's health is not as important as our salvation. Way too much focus is being placed on healing miracles when even some of Christ closest followers were not granted them.
I've been married to a wonderfull woman for 27 years. GOD has blessed me with her. 27 years ago last week while we were on a date she took her last steps. Her faith doesn't prevent her healing but a spinal blockage likely caused by Polio Replase which damaged the spinal cord and Myelin Nerve Sheaves prevent her form ever walking again in this life. It doesn't however prevent her from loving and praising GOD.
Why was it allowed to happen? We don't know. Why wasn't she healed? We don't know. We likely may not know while in this world. But I will say this much though. The interactions with people may well be the reason. It changed many persons life including hers, mine, and her daughters. It reached a lot of people. The why's are GOD's business. In faith I believe it will be to His Glory although we may not see the whole picture in our life on earth.
Immediately after my wife graduated from medical school, she went to Yale to work with the famous cancer surgeon Bernie Segal. She worked with cancer patients as a psychiatrist, helping them deal with their situation. She explained that it was the most rewarding life changing experience in her entire life. They learned how to live life.
So many of the cancer patients felt they were finally given the freedom to live and love after their diagnosis. It set them free. Both you and your wife have been blessed to have each other.