Matsya Purana — Description of Pralaya: Drying
अनेकानि सहस्राणि युगान्येकार्णवाम्भसि न चैनं कश्चिदव्यक्तं व्यक्तं वेदितुमर्हति //
anekāni sahasrāṇi yugānyekārṇavāmbhasi na cainaṃ kaścidavyaktaṃ vyaktaṃ veditumarhati //
For many thousands of yugas, (all) lay in the waters of the single cosmic ocean; and no one is able to truly know That—unmanifest—(as though it were) manifest and graspable.
It portrays pralaya as a long phase where the cosmos is submerged in a single undifferentiated ocean, and reality remains primarily “unmanifest” (avyakta), beyond ordinary knowing.
It implies humility and restraint: rulers and householders should recognize the limits of human certainty in cosmic matters, and therefore govern and live by dharma rather than egoistic claims of absolute knowledge.
No direct Vastu or ritual rule is stated; indirectly, it frames temple/ritual practice as a means to approach the unmanifest through manifest forms (icons, rites), while acknowledging the ultimate remains beyond full conceptual grasp.