Yancey, Where is God When it Hurts?, p. 58,
John Donne, a 17th century poet, experienced great pain. Because he married the daughter of a disapproving lord, he was fired from his job as assistant to the Lord Chancellor, yanked from his wife, and locked in a dungeon. (This is when he wrote that succinct line of despair, "John Donne/ Anne Donne/ Undone.") Later, he endured a long illness which sapped his strength almost to the point of death. In the midst of this illness, Donne wrote a series of devotions on suffering which rank among the most poignant meditations on the subject. In one of these, he considers a parallel: The sickness which keeps him in bed forces him to think about his spiritual condition.
Suffering gets our attention; it forces us to look to God, when otherwise we would just as well ignored Him.