48. Neither through vedic scriptures nor through sacrifices, study, charity, rituals nor even by severe austerities can I be seen in the world of men, excepting by you, O Arjuna.
Tatparya Nirnaya :- Even by study of the vedic scriptures people are not capable of seeing even as much as Arjuna has seen. Otherwise, the words seeing the wonderous form would amount to contradiction.
49 - 50. Do not unnecessarily be frightened nor be bewildered seeing this ferocious form of Mine. Free from fear and pleased in heart, behold again this (human) form of Mine.. Sanjay said: Having thus spoken to Arjuna, Vasudeva then revealed to him His own form. The Exalted One having again assumed His pleasant form comforted the frightened Arjuna.
Bhashya :- His own (human) form is in effect the form of illusion. Otherwise, (the vishvarupa) alone is His real form. For this enough evidence has been adduced earlier.
Tatparya Nirnaya :- He Himself creates, therefore, creates His own form (with four-form for those who are aware of His power, glory and divinity). For those who unaware (of His true form with four-form) He does not reveal His universal form. He shows specially this form to those who are unaware of the true form. Otherwise the statement “I desire to see Your Form” would be contradictory. The statement that the forms of the Lord are supreme and lower is only from the view point of those who are deluded. For the realized souls the universal form is accessible; for the rest the manifested forms like that of Sri Krishna as supreme.