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Grammatical Analysis

Viriya: [nt.] energy; effort; vigor; fortitude; exertion. Derived from vīra (a hero) or from root vīr (to command, sustain, be strong). Literally signifies the state or action of a spiritual warrior or hero.

Orthodox Definition

In the Theravāda Abhidhamma, viriya is classified as a miscellaneous mental factor (pakiṇṇaka-cetasika), meaning it can arise in both wholesome and unwholesome consciousness. When directed toward liberation, it serves as an indispensable spiritual faculty (indriya), a spiritual power (bala), and the enlightenment factor of energy (viriya-sambojjhaṅga).

The Visuddhimagga outlines its definitive criteria:

  • Lakkhaṇa (Characteristic): Exertion (ussahana-lakkhaṇa).
  • Rasa (Function): Supporting its co-arisen states (upatthambhana-rasa).
  • Paccupaṭṭhāna (Manifestation): Non-sinking (asaṃsīdanabhāva-paccupaṭṭhāna).
  • Padaṭṭhāna (Proximate Cause): The realization of urgency (saṃvega-padaṭṭhāna) or the basis for the commencement of effort (vīriyārambhavatthu-padaṭṭhāna). When rightly commenced, it is the root of all attainments (sabbasampattīnaṃ mūlaṃ).

Viriya must be balanced perfectly with concentration (samādhi); excessive energy leads to restlessness (uddhacca), while deficient energy slides into sloth and torpor (thīna-middha).

Quote

461. vīrabhāvo vīriyaṃ.
“461. The state of a hero is effort (vīriya).”

taṃ ussahanalakkhaṇaṃ, sahajātānaṃ upatthambhanarasaṃ, asaṃsīdanabhāvapaccupaṭṭhānaṃ.
“It is characterized by exertion; its function is to support its co-arisen states; its manifestation is non-sinking.”

‘‘saṃviggo yoniso padahatī’’ti (a. ni. 4.113) vacanato saṃvegapadaṭṭhānaṃ, vīriyārambhavatthupadaṭṭhānaṃ vā, sammā āraddhaṃ sabbasampattīnaṃ mūlaṃ hotīti daṭṭhabbaṃ.
“It has realization of urgency (saṃvega) as its proximate cause, or it has the basis for the commencement of effort as its proximate cause, according to the saying: ‘Having been stirred, one strives appropriately’; rightly commenced effort should be understood as the root of all attainments.”

— Visuddhimagga (XIV, 461)

Textual References

  • Sutta: Soṇa Sutta (AN 6.55) – The famous discourse where the Buddha uses the simile of a lute to show how energy must be tuned perfectly—neither too tight nor too slack—to cultivate stable concentration.
  • Abhidhamma: Dhammasaṅgaṇī (Exposition on the faculty of energy).
  • Commentary: Visuddhimagga (Chapter XIV) – Formulating the precise technical functions of heroic exertion.

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