Matsya Purana — Brahmā’s Four Faces
*मत्स्य उवाच सत्त्वं रजस् तमश् चैव गुणत्रयम् उदाहृतम् साम्यावस्थितिर् एतेषां प्रकृतिः परिकीर्तिता //
*matsya uvāca sattvaṃ rajas tamaś caiva guṇatrayam udāhṛtam sāmyāvasthitir eteṣāṃ prakṛtiḥ parikīrtitā //
Lord Matsya said: Sattva, rajas, and tamas are declared to be the three guṇas. The condition in which these abide in equilibrium is called Prakṛti, primordial Nature.
It defines Prakṛti as the equilibrium of sattva, rajas, and tamas—implying that cosmic manifestation begins when this balance is disturbed, and dissolution tends toward re-equilibration.
It frames ethical self-governance as managing the guṇas: cultivating sattva (clarity and restraint), regulating rajas (ambition and action), and reducing tamas (negligence), which supports righteous rule and disciplined household life.
No direct Vāstu or ritual rule is stated; indirectly, it supports the principle of balance (sāmya) as a foundational ideal behind orderly ritual conduct and harmonious design thinking later emphasized in Purāṇic traditions.