Isaac’s endurance was based on faith in God’s promise, faith that was instilled in him by his aged parents and later reinforced by Jehovah’s own word to him.
توانایی تحمّل و بردباری اسحاق از ایمانش به وعدهٔ خدا سرچشمه می‌گرفت که والدین سالخورده‌اش در دل او کاشته بودند و بعدها نیز با سخنان خود یَهُوَه تقویت و مستحکم شد .‏