Bhagavad Gita 14.11

सर्वद्वारेषु देहेऽस्मिन्प्रकाश उपजायते।ज्ञानं यदा तदा विद्याद्विवृद्धं सत्त्वमित्युत॥

sarvadvāreṣu dehe'sminprakāśa upajāyate |jñānaṃ yadā tadā vidyādvivṛddhaṃ sattvamityuta ||

When the wisdom-light shines through every gate of this body, then it may be known that Sattva is predominant.

When the light of knowledge gleams forth from all the gates of the body, then be sure that purity prevails.

Our plain-language meaning of this verse is waiting for scholar review.