6. You will waste your cancer if you spend too much time reading about cancer and not enough time reading about God.

It is not wrong to know about cancer. Ignorance is not a virtue. But the lure to know more and more and the lack of zeal to know God more and more is symptomatic of unbelief. Cancer is meant to waken us to the reality of God. It is meant to put feeling and force behind the command, “Let us know; let us press on to know the LORD” (Hosea 6:3). It is meant to waken us to the truth of Daniel 11:32, “The people who know their God shall stand firm and take action.” It is meant to make unshakable, indestructible oak trees out of us: “His delight is in the law of the LORD, and on his law he meditates day and night. He is like a tree planted by streams of water that yields its fruit in its season, and its leaf does not wither. In all that he does, he prospers” (Psalm 1:2). What a waste of cancer if we read day and night about cancer and not about God.

7. You will waste your cancer if you let it drive you into solitude instead of deepen your relationships with manifest affection.

When Epaphroditus brought the gifts to Paul sent by the Philippian church he became ill and almost died. Paul tells the Philippians, “He has been longing for you all and has been distressed because you heard that he was ill” (Philippians 2:26-27). What an amazing response! It does not say they were distressed that he was ill, but that he was distressed because they heard he was ill. That is the kind of heart God is aiming to create with cancer: a deeply affectionate, caring heart for people. Don’t waste your cancer by retreating into yourself.

8. You will waste your cancer if you grieve as those who have no hope.

Paul used this phrase in relation to those whose loved ones had died: “We do not want you to be uninformed, brothers, about those who are asleep, that you may not grieve as others do who have no hope” (1 Thessalonians 4:13). There is a grief at death. Even for the believer who dies, there is temporary loss—loss of body, and loss of loved ones here, and loss of earthly ministry. But the grief is different—it is permeated with hope. “We would rather be away from the body and at home with the Lord” (2 Corinthians 5:8). Don’t waste your cancer grieving as those who don’t have this hope.

9. You will waste your cancer if you treat sin as casually as before.

Are your besetting sins as attractive as they were before you had cancer? If so you are wasting your cancer. Cancer is designed to destroy the appetite for sin. Pride, greed, lust, hatred, unforgiveness, impatience, laziness, procrastination—all these are the adversaries that cancer is meant to attack. Don’t just think of battling against cancer. Also think of battling with cancer. All these things are worse enemies than cancer. Don’t waste the power of cancer to crush these foes. Let the presence of eternity make the sins of time look as futile as they really are. “What does it profit a man if he gains the whole world and loses or forfeits himself?” (Luke 9:25).

10. You will waste your cancer if you fail to use it as a means of witness to the truth and glory of Christ.

Christians are never anywhere by divine accident. There are reasons for why we wind up where we do. Consider what Jesus said about painful, unplanned circumstances: “They will lay their hands on you and persecute you, delivering you up to the synagogues and prisons, and you will be brought before kings and governors for my name’s sake. This will be your opportunity to bear witness” (Luke 21:12 -13). So it is with cancer. This will be an opportunity to bear witness. Christ is infinitely worthy. Here is a golden opportunity to show that he is worth more than life. Don’t waste it.

Remember you are not left alone. You will have the help you need. “My God will supply every need of yours according to his riches in glory in Christ Jesus” (Philippians 4:19).



John Piper has been the Pastor for Preaching at Bethlehem Baptist Church in Minneapolis, Minnesota, since 1980. He has authored numerous best-selling books, including The Passion of Jesus Christ, Don't Waste Your Life and Desiring God. You will find 25 years of online sermons, articles and other God-centered resources from the ministry of John Piper at   www.desiringgod.org. He also has a daily radio program, called "Desiring God," which can be accessed online at   www.desiringGod.org/radio.