Matsya Purana — Tārakāsura’s Austerity and Boon; Mobilization for War; Bṛhaspati’s Fourfold P...
किंतु नातपसा युक्तो मन्ये ऽहं सुरसंगमम् अहमादौ करिष्यामि ततो घोरं दितेः सुताः //
kiṃtu nātapasā yukto manye 'haṃ surasaṃgamam ahamādau kariṣyāmi tato ghoraṃ diteḥ sutāḥ //
“But I do not think I am yet equipped with austerity (tapas) for an encounter with the gods. First, I shall undertake it; thereafter, O dreadful sons of Diti, the next course will follow.”
This verse is not about Pralaya; it highlights tapas (ascetic power) as a prerequisite for confronting divine forces, a common Purana theme in cosmic conflicts.
Indirectly, it underscores disciplined preparation before undertaking high-stakes action—akin to a king’s duty to build strength (through restraint, counsel, and training) before engaging in war or major policy.
No Vastu or temple-architecture rule is stated; the ritual idea implied is that tapas functions like a spiritual ‘qualification’ (adhikāra) empowering later acts, whether battle, vow, or sacrifice.