The Personality of Godhead said: Knowledge about Me as described in the scriptures is very confidential, and it has to be realized in conjunction with devotional service. The necessary paraphernalia for that process is being explained by Me. You may take it up carefully.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यावानहं यथाभावो यद्रूपगुणकर्मकः । तथैव तत्त्वविज्ञानमस्तु ते मदनुग्रहात्
yāvānahaṃ yathābhāvo yadrūpaguṇakarmakaḥ | tathaiva tattvavijñānamastu te madanugrahāt
SB 2.9.31