It is impossible for people to understand the great opulence of Sri Krishna. Therefore Caitanya Mahaprabhu tells us to abandon speculating about God. There is a story of a frog in a well being approached by a friend who says, “My dear frog, I have just seen a huge body of water.” “What is that water?” the frog asks. “The Atlantic Ocean,” the friend replies. “Oh, the Atlantic Ocean! Is it bigger than this well? Is it four feet? Ten feet?”
Our attempt to speculate about God is very much like this. If we want to understand God, we have to try to understand from God Himself. We may have a neighbor who is very wealthy, influential, wise, strong and beautiful, and we may speculate about his opulence, but if we make friends with him, we can understand his position by listening to him speak about himself. God cannot he subjected to our imagination. Our imagination is limited, and our senses are imperfect. The process of bhakti-marga is the process of submission. There is no question of subjecting God to our imagination. We simply have to become very humble and submissive and pray to Krishna sincerely, “Krishna, it is not possible for me to know You. Kindly explain how it is I can know You, and then it will be possible.” This is the way Arjuna approached Krishna in the Eleventh Chapter of Bhagavad-gita.
Source: A.C. Bhaktivedanta Swami Prabhupada (2007 edition), “Teachings of Lord Kapila, The Son of Devahuti”, Page 223