Patanjali Yoga Sutra 3.36
Sanskrit Sutra
सत्त्वपुरुषयोरत्यन्तासंकीर्णयोः प्रत्ययाविशेषाद् भोगः परार्थत्वात् स्वार्थसंयमात् पुरुषज्ञानम्॥३६॥
Swami Vivekananda's translation
Enjoyment comes from the non-discrimination of the soul and Sattva which are totally different because the latter’s actions are for another. Samyama on the self-centred one gives knowledge of the Purusha.
Chapter link: Yoga Sutra Chapter 3
Related Gunas: Sattva

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