For one historian, the sanctioning of slavery was taking the attitude of those whom the prophet Isaiah denounced because they were saying: “Good is bad and bad is good. ” ​ — Isaiah 5: 20.
ووفقا لأحد المؤرِّخين ،‏ بموافقة الكنيسة على الرقّ اتّخذت موقف الذين دانهم النبي اشعيا لأنهم كانوا يقولون :‏ « للشر خيرا وللخير شرا » .‏ —‏ اشعياء ٥ :‏ ٢٠‏ .‏