Everyone's looking for true love, but few people seem willing to work at making it last. With separation and divorce so commonplace that most people see them as inevitable, it seems the very idea of marital commitment is fast becoming a foreign one. What's gone wrong? On Good Friday 1907, in the German university town of Halle, a young couple sealed their secret engagement with a kiss - and a vow to follow God wherever he led them. They were passionately in love, yet they rejected romance as the basis of their relationship, building instead on the promise of Jesus' words, Seek first the kingdom of God. Circumstance (and scandalized parents) kept them separated for most of the next three years. But that separation bore its own fruit: an intense flurry of letters.