Tim Challies pointed to an excellent blog posting by Mike Pohlman, who was writing about watching his wife battle her Stage IV cancer and persist in the fight of faith. It is a short read, full of Bible and wisdom, and I recommend it.
My own Dianne also wanders off to see her oncologist every six weeks or so. At every visit they take a sample of her blood to see if her Stage IV cancer is causing havoc again.
For six years she and I have lived with this regular reminder that the disease could return. Statistically, it will return. Actually, statistically, it should have killed her already.
So, like Mike with his Julia, I am humbled by this example in my home of faithful persistence. God does not allow the specter of her disease to crush her or make her morose, but rather uses it to remind her that he is good and faithful and very, very strong and kind. It has increased her affections for her children and her patience with me. It has made God look very precious.
And someday, because of the One, we’ll never think about the numbers related to cancer markers again:
He will swallow up death forever;
and the Lord God will wipe away tears from all faces,
and the reproach of his people he will take away from all the earth,
for the Lord has spoken.
It will be said on that day,
“Behold, this is our God; we have waited for him, that he might save us.
This is the Lord; we have waited for him;
let us be glad and rejoice in his salvation.”
Isaiah 25:8-9
The Works of God 
Thanks for this hopeful post, John. I do see a peaceful love for Jesus in Dianne. She blesses those who know her and with your testimony of her faith, many who do not.
Thank you for your transparency and your love for your wife, John.