Link to purport by A C Bhaktivedanta Swami Srila Prabhupada

Transcript of Bhakti-Shastri class on this verse by Chaitanya Charan

So Arjuna has asked to show the form of Chatur Bhuja because he wanted to ensure that there should not be any doubt on the divinity of Krishna. Krishna shown Virat Rupa and also Vishnu Rupa. That way it is clear Krishna can manifest all other forms and Krishna is the original Supreme Personality of God Head. So Arjuna wanted to establish that beyond any ambiguity

Bg 11.46

kirīṭinaṁ gadinaṁ cakra-hastam
icchāmi tvāṁ draṣṭum ahaṁ tathaiva
tenaiva rūpeṇa catur-bhujena
sahasra-bāho bhava viśva-mūrte

Word for word: 

kirīṭinam — with helmet; gadinam — with club; cakrahastam — disc in hand; icchāmi — I wish; tvām — You;draṣṭum — to see; aham — I; tathā eva — in that position; tena eva — in that; rūpeṇa — form; catuḥbhujena — four-handed; sahasrabāho — O thousand-handed one; bhava — just become; viśvamūrte — O universal form.

Translation: 

O universal form, O thousand-armed Lord, I wish to see You in Your four-armed form, with helmeted head and with club, wheel, conch and lotus flower in Your hands. I long to see You in that form.

End of transcription.