Matsya Purana — Nārāyaṇa as Haṃsa in the Cosmic Ocean: Vedic Yajña-Puruṣa and Mārkaṇḍeya’s Vi...
तस्योत्पन्नं भयं तीव्रं संशयश्चात्मजीविते देवदर्शनसंहृष्टो विस्मयं परमं गतः //
tasyotpannaṃ bhayaṃ tīvraṃ saṃśayaścātmajīvite devadarśanasaṃhṛṣṭo vismayaṃ paramaṃ gataḥ //
In him there arose an intense fear and also doubt about his own survival; yet, exhilarated by the sight of the deity, he was carried into the highest astonishment.
It reflects the human response at the threshold of Pralaya—fear for survival and uncertainty—yet frames the divine appearance as a source of overwhelming wonder, implying protection and guidance amid dissolution.
It suggests that even rulers/householders must steady themselves in crisis: acknowledge fear and doubt, but orient the mind toward dharma through reverence for the Divine, which enables right action rather than panic.
No direct Vastu or temple-building rule is stated; the ritual takeaway is the transformative power of deva-darśana (sacred vision), a core motive behind worship, pilgrimage, and consecration practices.