Sanskrit

ज्योतिषामपि तज्ज्योतिस्तमसः परमुच्यते।ज्ञानं ज्ञेयं ज्ञानगम्यं हृदि सर्वस्य विष्ठितम्।।13.18।।

Summary

It is the light of lights, beyond the reach of darkness; the wisdom, the only thing worth knowing or that wisdom can teach; the presence in the hearts of all.