On account of its blazing energy it was incapable of being looked at by and person except the holder of Pinaka. It was, therefore, that Bhava named it Sudarshanam.
न शक्यं द्रष्टुमन्येन वर्जयित्वा पिनाकिनम्। सुदर्शनं भवत्येवं भवेनोक्तं तदा तु तत्॥