Matsya Purana — Characteristics of Dvāpara and Kali Yugas
विचारणायां वैराग्यं वैराग्याद्दोषदर्शनम् दोषाणां दर्शनाच्चैव ज्ञानोत्पत्तिस्तु जायते //
vicāraṇāyāṃ vairāgyaṃ vairāgyāddoṣadarśanam doṣāṇāṃ darśanāccaiva jñānotpattistu jāyate //
From discriminative inquiry (vicāraṇā) arises dispassion (vairāgya); from dispassion comes the perception of faults. And from clearly seeing those faults, the arising of true knowledge is born.
It does not describe cosmic pralaya directly; it presents an inner, psychological sequence—discernment leading to detachment and knowledge—often used in the Purana as the means to transcend fear and suffering associated with impermanence.
It supports disciplined governance and household life by urging vicāra (clear judgment) and vairāgya (non-attachment), so one can recognize the defects of ego-driven pleasure and rule or live by dharma without being controlled by craving.
No direct Vastu or ritual procedure is stated; indirectly, it frames the mental purity required for any rite—knowledge and right intention arise when one practices discernment and detachment.