Matsya Purana — Tārakāsura’s Austerity and Boon; Mobilization for War; Bṛhaspati’s Fourfold P...
सुजनो ऽपि स्वभावस्य त्यागं वाञ्छेत्कदाचन एवं मे बुध्यते बुद्धिर् यूयमत्र व्यवस्यत //
sujano 'pi svabhāvasya tyāgaṃ vāñchetkadācana evaṃ me budhyate buddhir yūyamatra vyavasyata //
Even a good person should at times wish to abandon his own ingrained nature. Thus does my understanding judge; you should decide firmly on this point.
This verse does not discuss Pralaya directly; it teaches moral psychology—Dharma may require overriding one’s habitual nature, which is a practical ethic rather than a cosmological statement.
It supports Rajadharma and gṛhastha-dharma by stating that virtue is not merely temperament-based: a ruler or householder must consciously restrain and reform harmful habits (svabhāva) to uphold justice, discipline, and social order.
No Vastu or ritual procedure is specified; the takeaway is general—successful ritual life and temple service also depend on inner discipline and firm resolve (vyavasāya).