Verse
ज्योतिषामपि तज्ज्योतिस् तमसः परमुच्यते ।ज्ञानं ज्ञेयं ज्ञानगम्यं हृदि सर्वस्य विष्ठितम् ॥
jyotiṣāmapi tajjyotis tamasaḥ paramucyatejñānaṃ jñeyaṃ jñānagamyaṃ hṛdi sarvasya viṣṭhitam
He is the light of all lights and luminous beyond all the darkness of our ignorance. He is knowledge and the object of knowledge. He is seated in the hearts of all.
Gītā 13·18This eternal Light is in the heart of every being; it is he who is the secret knower of the field, khetrajña, and presides as the Lord in the heart of things over this province and over all these kingdoms of his manifested becoming and action.