Although I am not easily knowable by the conditioned soul, you have known Me today because you know that My personality is not constituted of anything material, and specifically not of the five gross and three subtle elements.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
ज्ञातोऽहं भवता त्वद्य दुर्विज्ञेयोऽपि देहिनाम् । यन्मां त्वं मन्यसेऽयुक्तं भूतेन्द्रियगुणात्मभिः
jñāto'haṃ bhavatā tvadya durvijñeyo'pi dehinām | yanmāṃ tvaṃ manyase'yuktaṃ bhūtendriyaguṇātmabhiḥ
SB 3.9.36