“Preach the gospel – and if necessary use words.” This pithy quote by St. Francis of Assisi has captured the hearts and minds of many. The sentiment sounds right and may even feel right but fails, in the final analysis, to do justice to the gospel. Yes, the gospel is meant to be lived. Yes, the gospel makes a difference in the lives of others and demands sacrificial service. But St. Francis falls short in the matter of proclamation. We may serve people and love them, but if we fail to proclaim the message of the good news, the “gospel” loses its efficacy.

Raleigh Sadler’s book, Vulnerable: Rethinking Human Trafficking works hard to maintain a commitment to proclaiming the gospel and reaching people by engaging them at every level. The heart of the author is unveiled at the beginning of the book and serves as the general theme of the book: “Jesus Christ motivates vulnerable people, like you and me, to love other vulnerable people for us, to the point of death.” Christ’s vulnerability, then, serves as a supreme example for his people and motivates them to love others.

Sadler exposes the trafficking industry and calls Christians to make a difference. His ultimate aim is to eradicate all human trafficking. Vulnerable is filled with stories of people who have been marginalized, manipulated, or trafficked in some way. The interview with Michael Horton is the highlight of the book as Dr. Horton weighs in on the subject of trafficking. “I’m not a co-redeemer with Christ when I’m opposing human trafficking; rather I’m witnessing to that redemption that Christ has already won, and will one day consummate when he returns bodily,” writes Horton. Such a perspective provides a keen biblical balance that remains obedient to Scripture but also steers clear from any liberalizing proclivities of the so-called “social justice” movement.

Vulnerable is not an easy book to read. The pain and suffering that the author reveals, however, is a reality that Christians must face. The only answer is the saving message of the gospel of Jesus Christ.