Arjuna was graced by that flag studded with gems and that flag was graced by Arjuna by that flag studded with gems and that flag was graced by Arjuna holding Gandiva bow. It was just the same as sun god is graced by Meru mountain and Meru mountain receives grandeur from the presence of sun god.
तेन रत्नवता पार्थः स च गाण्डीवधन्वना॥ बभूव परमोपेतः सुमेरुरिव भानुना।