II
May we be able to learn that Nachiketa fire-sacrifice, which is a bridge for those who perform sacrifice. May we also know the One, who is the highest imperishable Brahman for those who desire to cross over to the other shore which is beyond fear.
The significance of this text is May we acquire the knowledge of Brahman, the Supreme, in both manifested and unmanifested form. He is manifested as the Lord of sacrifice for those who follow the path of ritual. He is the unmanifested, eternal, universal Supreme Being for those who follow the path of wisdom. The "other shore," being the realm of immortality, is said to be beyond fear; because disease, death, and all that which mortals fear, cease to exist there. It is believed by many that these two opening verses were a later interpolation.
III
Know the Atman (Self) as the lord of the chariot, and the body as the chariot. Know also the intellect to be the driver and mind the reins.
IV
The senses are called the horses; the sense objects are the roads; when the Atman is united with body, senses and mind, then the wise call Him the enjoyer.
In the third chapter Yama defines what part of our being dies and what part is deathless, what is mortal and what is immortal. But the Atman, the Higher Self, is so entirely beyond human conception that it is impossible to give a direct definition of It. Only through similies can some idea of It be conveyed. That is the reason why all the great Teachers of the world have so often taught in the form of parables. So here the Ruler of Death represents the Self as the lord of this chariot of the body. The intellect or discriminative faculty is the driver, who controls these wild horses of the senses by holding firmly the reins of the mind. The roads over which these horses travel are made up of all the external objects which attract or repel the senses:—the sense of smelling follows the path of sweet odours, the sense of seeing the way of beautiful sights. Thus each sense, unless restrained by the discriminative faculty, seeks to go out towards its special objects. When the Self is joined with body, mind and senses, It is called the intelligent enjoyer; because It is the one who wills, feels, perceives and does everything.
V
He who is without discrimination and whose mind is always uncontrolled, his senses are unmanageable, like the vicious horses of a driver.