Srimad Bhagavatam Canto 03, Chapter 06, Text 35

SB 3.6.35

etat ksattar bhagavato
 daiva-karmatma-rupinah
kah sraddadhyad upakartum
 yoga-maya-balodayam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O Vidura, who can estimate or measure the transcendental time, work and potency of the gigantic form manifested by the internal potency of the Supreme Personality of Godhead?
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The froggish philosophers may go on with their mental speculations on the subject matter of the virat, the gigantic form exhibited by the yoga-maya internal potency of the Supreme Personality of Godhead, but factually no one can measure such a vast exhibition. In Bhagavad-gita (11.16) Arjuna, the recognized devotee of the Lord, says:
 
aneka-bahudara-vaktra-netram
 pasyami tvam sarvato ’nanta-rupam
nantam na madhyam na punas tavadim
 pasyami visvesvara visva-rupa
 
“O my Lord, O gigantic visva-rupa form, O master of the universe, I see innumerable hands, bodies, mouths and eyes in all directions, and they are all unlimited. I cannot find the end of this manifestation, nor do I see the middle, nor the beginning.”
 
Bhagavad-gita was specifically spoken to Arjuna, and the visva-rupa was exhibited before him at his request. He was awarded the specific eyes to see this visva-rupa, yet although he was able to see the Lord’s innumerable hands and mouths, he was unable to see Him completely. Since Arjuna was unable to estimate the length and breadth of the potency of the Lord, who else would be able to do so? One may only indulge in miscalculation like the frog-philosopher. The frog-philosopher wanted to estimate the length and breadth of the Pacific Ocean by his experience of a well three cubic feet large, and thus he began to puff himself up to become as big as the Pacific Ocean, but at last he burst and died by this process. This story is applicable to the mental philosophers who, under the illusion of the Lord’s external energy, indulge in estimating the length and breadth of the Supreme Lord. The best path is to become a cool-headed, submissive devotee of the Lord, try to hear about the Lord from the bona fide spiritual master, and thus serve the Lord in transcendental loving service, as suggested in the previous verse.
Srimad Bhagavatam Canto 03, Chapter 06, Text 34
Srimad Bhagavatam Canto 03, Chapter 06, Text 36