Bhagavad Gita 14.11

सर्वद्वारेषु देहेऽस्मिन्प्रकाश उपजायते |
ज्ञानं यदा तदा विद्याद्विवृद्धं सत्त्वमित्युत

Translation

When all the gates of the body are illumined by knowledge, know it to be a manifestation of the mode of goodness.