It saddens me to hear you are mourning the loss of your dear loved one. When we see our loved ones suffering from an illness, then succumbed to death, naturally we feel helpless. God's word, the Bible, is a great comfort in times like these and give us hope for the future. Isaiah 33:24 speak of a time when "no resident will say I am sick" and Revelation 21:4 tells us God will "wipe out every tear from their eyes and death will be no more...." These scriptures and others alike is what keeps me going in times like these, knowing God does not cause death, but wants to soon end it. My condolences.