I saw Mary every Tuesday when I visited “the House”—a home that helps former prisoners reintegrate into society. My life looked different from hers: fresh out of jail, fighting addictions, separated from her son. You might say she lived on the edge of society.

Like Mary, Onesimus knew what it meant to live on the edge of society. As a slave, Onesimus had apparently wronged his Christian master, Philemon, and was now in prison. While there, he met Paul and came to faith in Christ (v. 10). Though now a changed man, Onesimus was still a slave. Paul sent him back…