Arjuna was disturbed to see the universal form of the Lord Krishna.
So, he desired to see the four handed form of the Lord.
Upon the request of Arjuna, Lord showed his 4 handed form of Vishnu & later 2 handed humanlike form.
Pure devotees of the Lord are actually interested in seeing 2 – handed form of the Lord which is very beautiful.
In the Brahma – samhita (5.38) it is said ‘premanjana – cchurita – bhakti – vilocanena (5.38)’ i.e. a person whose eyes are smeared with the ointment of love can see the beautiful form of Sri Krishna.
Arjuna was very much pleased to see the humanlike form of the Lord.
Thus the Lord of the Universe showed his universal form, 4 – handed form & 2 handed form to Arjuna.
Krishna’s 2 – handed form is very pleasing & even demigods like Lord Siva & Lord Brahma desire to see it.
Krishna is not visible to those people who deride him.
Krishna’s body is not made of matter.
Krishna’s body is completely spiritual & is full of knowledge, bliss & eternity.