atha va bahunaitena
kim jnatena tavarjuna
vistabhyaham idam krtsnam
ekamsena sthito jagat

"But what need is there, Arjuna, for all this detailed knowledge? With a single fragment of Myself I pervade and support this entire universe."

Athava = therefore. That is after explaining by the previous slokas that He was everything, micro or macro, movable or stationary, animate or inanimate, and everything was His property. He controls evertything. Bahunaitena = listening to all, kim = what, jnatena = additional knowledge, tavarjuna = to you, Arjuna? The Lord asks what benefit is to Arjuna by listening to more. What is implied is, He has given examples of His eminence in 18 slokas. By saying more in another 100 or 1000 slokas, Arjuna is not going to understand the finality of the property of the Lord. Arjuna can not derive the benefit that he has understood all His properties. What He told was a glimpse and that was enough for Arjuna. Idam = the perceptible, jagat =Universe, krstnam = without anexception all, aham = I [Sri Krishna], ekamsena = by a miniature fraction of, vishtabhya = supporting. Without any exception, whatever was percieved in this Universe, are all supported by a microscopic fraction of Him. For the word entire, Swami Ramanuja gives an explanation. It is all movable and non-moving, chetanam and achetanam, differing by appearance, magnitude, etc. What is supporting? Especially, when the Lord says He supports all what we percieve in this Universe and other invisible worlds; how is it possible? When we lift a book, we can clearly see the hand supporting the book. But the Lord is supporting from inside, as antharatman. He is inside and at the same time surrounds - antar bahischa tad sarvam vyapya narayana sthitha:. It is not mere holding, but by supporting it is meant that the Lord is the cause for our origin, presence and destruction. Every action like being born or living or dying, are all in His domain and control. All atman - baddha, Mukta and Nithya - and all achetanam or lifeless matter are all under His control. Summarising the Lord says all actions of everything without exception is in His control. He supports everything by a fraction of Him. In Vishnu Purana, Parashara says that He prostrates to the Lord, whose millionth fraction of a millionth fraction supports this Universe. The Lord wants Arjuna to realize the eminence of the Lord. In the entire Chapter the Lord tells what His greatness is. There is no use in further telling this. Now Arjuna should realize the glory of the Lord. We should also realize that every action of ours is in His control. To get this knowledge we should worship Lord Sri Hayagriva, as mentioned in the beginning.