1. Cancer is not wasted when it is healed by God. He gets the glory, and that is why cancer exists.
2. So the groaning of our cancer has a double meaning. It means that sin is horrible, and it means that glorious freedom is coming.
3. If we don't believe our cancer is designed for us by God, we will waste it.
4. God's design is clear from 2 Corinthians 1:9: "We felt that we had received the sentence of death. But that was to make us rely not on ourselves but on God who raises the dead."
5. God designs to deepen our love for Christ. Cancer does not win if we die. It wins if we fail to cherish Christ.
6. Cancer is meant to waken us to the reality of God.
7. That is the kind of heart God is aiming to create with cancer: a deeply affectionate, caring heart for people.
8. Cancer is designed to destroy the appetite for sin. ... Don't just think of battling against cancer. Also think of battling with cancer.
9. Cancer will be your opportunity to bear witness (Luke 21:12-13).
[From John Piper's "DON'T WASTE YOUR CANCER"]