717. Cái gì “có mắt mà chẳng thấy; có tai mà không nghe; có lỗ mũi mà chẳng ngửi; có tay nhưng không rờ rẫm; có chân nào biết bước đi”? What is it that “have mouths, but cannot speak, eyes, but they cannot see; they have ears, but cannot hear, noses, but they cannot smell; they have hands, but cannot feel, feet, but they cannot walk”? *