Matsya Purana — Characteristics of Dvāpara and Kali Yugas
मन्वन्तराणां परिवर्तनानि चिरप्रवृत्तानि युगस्वभावात् क्षणं न संतिष्ठति जीवलोकः क्षयोदयाभ्यां परिवर्तमानः //
manvantarāṇāṃ parivartanāni cirapravṛttāni yugasvabhāvāt kṣaṇaṃ na saṃtiṣṭhati jīvalokaḥ kṣayodayābhyāṃ parivartamānaḥ //
The alternations of the Manvantaras have been proceeding since ancient times, by the very nature of the Yugas. The world of living beings does not remain fixed even for a moment, ever turning through decline and rise.
It frames existence as cyclical: the living world continually moves through kṣaya (decline) and udaya (renewal), implying recurring dissolution-and-recreation dynamics rather than a single, final end.
By stressing that nothing in jīvaloka is stable even for a moment, it supports the Matsya Purana’s ethical emphasis on timely dharma—ruling, charity, ritual, and restraint should be practiced with urgency, without assuming permanence of power, wealth, or life.
No direct Vāstu or temple-rule is stated; the takeaway is ritual-temporal: rites and dharmic works should be aligned with time (yuga/kāla awareness), since conditions continually shift through decline and renewal.