सर्वद्वारेषु देहेऽस्मिन्प्रकाश उपजायते। ज्ञानं यदा तदा विद्याद्विवृद्धं सत्त्वमित्युत ॥

sarva-dvāreṣhu dehe ’smin prakāśha upajāyate jñānaṁ yadā tadā vidyād vivṛiddhaṁ sattvam ity uta

When the wisdom-light streameth forth from all the gates of the body, then it may be known that Harmony is increasing.

In plain words: Krishna says when clear understanding shines through all your senses, you can tell that goodness is growing in you.