A verse-by-verse study of 3 John, John's short final letter, contrasting three men—Gaius (strong in soul, faithful, hospitable), Diotrephes (proud, selfish, a slanderer who rejected the brethren), and Demetrius (a man of good report)—and exhorting believers to walk in the truth, exercise themselves toward godliness, and show hospitable love to both brethren and strangers.