I would add, that sickness or cancer has a marvelous use in turning people, believers and nonbelievers to God and all that He has done, which brings them into a great relationship with the Almighty God. It also brings them to a better understanding of love. God’s love, and the love from friends and family. It can bring to you a better understanding of love.
All of a sudden God has a place in one’s life because there is no one else to turn to. Rightly so because God is the only one that can do anything about the feelings about sickness or to prepare for the future.