God as my witness: This mild oath shows he is telling the truth (see 1 Samuel 12:5; 20:12; Job 16:19; compare Ruth 1:17; 1 Samuel 14:44; 2 Samuel 3:35; 1 Kings 2:23; Jeremiah 42:5). Paul changed his travel plans to avoid giving them a severe rebuke (2 Corinthians 1:23) and to prevent another painful visit (2:1).