Matsya Purana — The Pushkara Manifestation
तपसा तेजसा चैव वर्चसा नियमेन च सदृशीमात्मनो देवीं समर्थां लोकसर्जने //
tapasā tejasā caiva varcasā niyamena ca sadṛśīmātmano devīṃ samarthāṃ lokasarjane //
By austerity (tapas), spiritual radiance (tejas), splendor/vital potency (varcas), and disciplined observance (niyama), he fashioned a Goddess akin to his own nature—fully capable of bringing worlds into being.
It highlights the creative mechanism after (or apart from) dissolution: disciplined tapas generates tejas/varcas, through which a Shakti-like Devī is empowered to accomplish lokasarga (world-creation).
It elevates niyama (regulated discipline) and self-restraint as the foundation of effective power—implying that rulers and householders gain true authority and prosperity through ethical discipline, not mere force.
While not a direct Vāstu rule, it provides the ritual principle behind efficacy: successful rites (and by extension consecrations) depend on tapas, tejas, and niyama—inner discipline that empowers sacred action.