My husband had stomach cancer in 2002 and had to have most of his stomach removed. I recall the doctor coming in and asking him if he was ready for the surgery, to which he replied. "I feel like I am Little David going out to fight Goliath. This battle here is much bigger than I am, and it has been given to God and has been won". My husband is doing incredible and is a living testimony that the BIG "C" (Christ) who lives within us is bigger than the little "c" (cancer) that is attacking us.
You are in my prayers! Just know that this Battle has been WON by the Lord for your father!!!
Dorothy