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Tattva Bodhaतत्त्वबोधः
Tattva Bodha · passage 3

Discernment of the real

नित्यानित्यवस्तुविवेकः कः? नित्यवस्त्वेकं ब्रह्म तद्व्यतिरिक्तं सर्वमनित्यम् । अयमेव नित्यानित्यवस्तुविवेकः ।
In transliteration
nityānityavastuvivekaḥ kaḥ? nityavastvekaṃ brahma tadvyatiriktaṃ sarvamanityam | ayameva nityānityavastuvivekaḥ |

In English

What is discernment between the lasting and the unlasting? Brahman alone is the lasting reality; all else apart from it is unlasting. This seeing, just this, is that discernment.

In plain words

What is discrimination between the eternal and the non-eternal? Brahman alone is eternal; everything other than Brahman is non-eternal. This understanding itself is that discrimination.

The terms set down here
  • viveka
  • brahman

In the commentaries

Sri SankaraAdvaita

Viveka here is not faultfinding but a clear seeing that tells apart what lasts from what does not, and the test it sets is exact: only Brahman is nitya, the timeless that neither comes nor goes nor changes, and whatever stands apart from it, the body, the senses, the mind, the whole moving world, is anitya, bound to time. Nitya is meant narrowly, on purpose. It does not mean long-lasting or hard to destroy; the gods and the heavens endure ages and are still counted with the unlasting, because anything that begins, ends, or alters belongs on that side. This stands first on the path of inquiry, because the seeker must be able to tell the abiding from the passing before the search for the Self can even begin; without it one keeps mistaking the changing for the real and looks for rest where there is none. And the discernment is just this understanding itself, the settled conviction carried into each thing one meets, not a single thought thought once and set down.

Read on Sri Sankara's terms: nitya as the changeless real, set out in his Brahma-sutra and Upanisad bhasyas, where the eternal Self stands against the time-bound world. Tattva Bodha is a later prakarana ascribed to him rather than a work he glossed; the application here follows the standard Tattvabodha expositions of Swami Dayananda Saraswati, Swami Paramarthananda, and Swami Chinmayananda and Swami Tejomayananda.
The crux
When you call only Brahman lasting, are you measuring how long a thing endures, or marking what never changes at all?

Why does this teaching count the long-enduring heavens among the unlasting?

  • Because they are less real than the earth we can see and touch
  • Because lasting here means changeless, and anything that begins, ends, or alters belongs with the passing
  • Because only what a person experiences directly can be called lasting
  • Because the heavens are not named among the eternal
Show the answer
Because lasting here means changeless, and anything that begins, ends, or alters belongs with the passing. You are not sorting by how long a thing endures. However many ages it lasts, if it begins, ends, or changes it stands with the unlasting; only what never alters, Brahman, is counted as the lasting. So the line you draw is changelessness, not length of time.

Telling the lasting from the rest

The path opens with a sorting. Before anything is sought, the seeker is asked whether the abiding can be told from the passing, and the answer here is plain and narrow. One thing alone is nitya, the lasting: Brahman. Everything else, without exception, stands on the other side as anitya, the unlasting. The body that is here and gone, the senses that tire, the mind that runs from mood to mood, the world that turns; all of it is set with the passing. This seeing, just this, is what the first qualification means.

Hear how strictly nitya is meant. It is not a measure of how long a thing lasts. The heavens endure ages, far beyond a human span, and they are still counted among the unlasting, because whatever has a beginning will have an end, and whatever can change is not the changeless. Nitya names what neither rises nor sets nor alters, and by that test only Brahman is left. So the discernment is not a ranking of the durable over the brief; it is a line drawn between the timeless and everything that moves in time.

Notice too what kind of seeing it is. The discernment is just this understanding itself: not a single thought thought once and laid down, but a settled clarity carried into each thing one meets, sorting the abiding from the passing again and again. This is why it comes first. Until the seeker can tell the changing from the unchanging, the search for the Self cannot rightly begin, for one keeps taking the passing for the real and looking for rest where nothing rests. This first viveka is the eye the rest of the path depends on.

Look at what you lean on for steadiness today: does any of it stand outside time, or have you been resting on the passing?