Maitrayana-Brahmaya-Upanishad: Fourth Prapathaka

2. It has been said elsewhere: Like the waves in large rivers, that which has been done before, cannot be turned back, and, like the tide of the sea, the approach of death is hard to stem. Bound by the fetters of the fruits of good and evil, like a cripple; without freedom, like a man in prison; beset by many fears, like one standing before Yama (the judge of the dead); intoxicated by the wine of illusion, like one intoxicated by wine; rushing about, like one possessed by an evil spirit; bitten by the world, like one bitten by a great serpent; darkened by passion, like the night; illusory, like magic; false, like a dream; pithless, like the inside of the Kadali; changing its dress in a moment, like an actor; fair in appearance, like a painted wall, thus they call him; and therefore it is said:

Sound, touch, and other things are like nothings; if the elemental Self is attached to them, it will not remember the Highest Place.

3. This is indeed the remedy for the elemental Self: Acquirement of the knowledge of the Veda, performance of one's own duty, therefore conformity on the part of each man to the order to which he happens to belong. This is indeed the rule for one's own duty, other performances are like the mere branches of a stem. Through it one obtains the Highest above, otherwise one falls downward. Thus is one's own duty declared, which is to be found in the Vedas. No one belongs truly to an order (asrama) who transgresses his own law. And if people say, that a man does not belong to any of the orders, and that he is an ascetic, this is wrong, though, on the other hand, no one who is not an ascetic brings his sacrificial works to perfection or obtains knowledge of the Highest Self. For thus it is said:

By ascetic penance goodness is obtained, from goodness understandino, is reached, from understanding the Self is obtained, and he who has obtained that, does not return.

4. “Brahman is,” thus said one who knew the science of Brahman; and this penance is the door to Brahman, thus said one who by penance had cast off all sin. The syllable Om is the rnanifest greatness of Brahman, thus said one who well grounded (in Brahman) always meditates on it. Therefore by knowledge, by penance, and by meditation is Brahman gained. Thus one goes beyond Brahman (Hiranyagarbha), and to a divinity higher than the gods; nay, he who knows this, and worships Brahman by these three (by knowledge, penance, and meditation), obtains bliss imperishable, infinite, and unchangeable. Then freed from those things (the senses of the body, &c.) by which he was filled and overcome, a mere charioteer, he obtains union with the Self.