laukika-parīkṣakāṇāṁ yasminn arthe buddhi-sāmyaṁ sa dṛṣṭāntaḥ |
(Nyāya-sūtra: 1.1.25)
“That object in regard to which common people and examiners [i.e., those who deliberate logically] have a likeness in understanding is [called] an example (dṛṣtānta).”
pradīpaḥ sarva-vidyānām upāyaḥ sarva-karmaṇām |
āśrayaḥ sarva-dharmānāṁ vidyoddeśe prakīrtitā ||
(Vātsyāyana’s Nyāya-bhāṣya on Gautama’s Nyāya-sūtra: 1.1.1)
“Ānvīkṣikī [i.e., logic (nyāya)] is stated in the enumeration of sciences [i.e., fields of knowledge] to be the lamp of all sciences (vidyās), the means for [accomplishing] all karmas, and the basis of all dharmas.”
dharma-śāstreṣu mukhyeṣu vidyamāṇeṣu durbudhāḥ |
buddhim ānvīkṣikīṁ prāpya nirarthaṁ pravadanti te ||
(Rāmāyaṇa: Ayodhya-kāṇḍa, 100.36)
“[Even] In the presence of the principal dharma-śāstras, the ignorant take to logic [i.e., purely logic inquiry] and profess meaningless assertions.”
yo’vamanyeta te mūle hetu-śāstrāśrayād dvijaḥ |
sa sādhubhir bahiṣkāryo nāstiko veda-nindakaḥ ||
(Manu Smṛti: 2.11)
“A twice-born who disregards those two sources [of instruction, i.e., the Śruti and Smṛti] on account of adherence to hetu-śāstra [i.e., nyāya-śāstra] is an unbeliever (nāstika), a defamer of the Veda, and to be shunned by sādhus.”
aneka-samavetatvaṁ jātitvam |
(Amṛta-ṭīkā on Hari-nāmāmṛta-vyārakaraṇa: 923)
“Inherence in many [i.e., that which is inherent in many different entities] is a classification (jāti) [alt., a generic property].”
kāṇādaṁ pāṇinīyaṁ ca sarva-śāstropakārakam |
(Unknown source)
“The work of Kaṇāda [i.e., Vaiśeṣika-darśana, or, loosely, logic] and the work of Pāṇini [i.e., vyākaraṇa, or, loosely, grammar] are helpful in all śāstras [i.e., all fields of knowledge].”
yaḥ sāṅkhya-paṅkena kutarka-pāṁśunā
vivarta-gartena ca lupta-dīdhitim |
śuddhaṁ vyadhād vāk-sudhayā maheśvaraṁ
kṛṣṇaṁ sa jīvaḥ prabhur astu me gatiḥ ||
(Baladeva Vidyābhūṣaṇa’s ṭīkā on Tattva-sandarbha: 1.4)
“The master Jīva—
He who with the nectar of his words
Made bright [alt., clear] the Supreme Īśvara, Kṛṣṇa,
Who had become of shrouded luster
Because of the mud of Sāṅkhya,
The dust of fallacious argument [i.e., Nyāya],
And the ditch of Vivarta [i.e., Māyāvāda]—
Be my shelter.”
