Beware of refusing to hear the call of God. Everyone who is saved is called to testify to the fact of his salvation. That, however, is not the same as the call to preach, but is merely an illustration which can be used in preaching. In this verse, Paul was referring to the stinging pains produced in him by the compelling force of the call to preach the gospel. Never try to apply what Paul said regarding the call to preach to those souls who are being called to God for salvation. There is nothing easier than getting saved, because it is solely God’s sovereign work— “Look to Me, and be saved . . .” (Isaiah 45:22).