How to Serve God Unceasingly

Paul was absolutely submissive to the sovereign will of God. The reason I'm calling God to be my witness is because there's nobody else to call the witness because this is happening in my spirit where nobody else can see. So he ministers in his spirit invisibly, nobody can see this. And that's what he wants them to know and nobody can prove that to them if God doesn't cause them to believe him by his witness.