Matsya Purana — Cosmic Architecture of Sun–Moon and the ‘Houses of the Gods’
चतुर्भूतावशिष्टे ऽस्मिन् ब्रह्मणा समधिष्ठिते स्वयम्भूर् भगवांस्तत्र लोकतत्त्वार्थसाधकः //
caturbhūtāvaśiṣṭe 'smin brahmaṇā samadhiṣṭhite svayambhūr bhagavāṃstatra lokatattvārthasādhakaḥ //
When that state remained as the residue of the four elements and was presided over by Brahmā, there the Self-born (Svayambhū), the Blessed Lord, brought forth the true principles of the worlds and their meaning—namely, their ordered reality.
It implies a post-dissolution or transitional cosmic condition where only the elemental residue remains, after which ordered creation proceeds under Brahmā’s presidency and the Self-born principle establishes the realities (tattvas) of the worlds.
Indirectly, it frames dharma as grounded in cosmic order: rulers and householders uphold stability by aligning conduct with the world’s established principles (tattva-artha), mirroring how creation itself is structured and governed.
No direct Vāstu or ritual rule is stated; however, the emphasis on establishing “tattva” and “artha” supports the Vāstu idea that sacred building and rites should reflect cosmic principles and ordered realms (loka-krama).