workers went out from another church, likely John’s. They were “strangers” to Gaius (v. 5), so clearly not from his congregation. And yet John says that Gaius “ought” to support these people so that together John’s church and Gaius’s church might partner together for the truth. Mutual support of missionaries is real gospel partnership that brings honor to Christ. 3. Knowing whom we ought to support is crucial (vv. 6–8). But how can we know whom to support? The apostle John narrows it down for us