Perhaps the intelligent Arjuna who is incapable of bearing pain and who though ever obedient to Yudhishthira yet feels himself pierced by the remembrance of his wrongs, does not at all sleep in the night.
तथार्जुनः सुकुमारो मनस्वी वशे स्थितो धर्मसुतस्य राज्ञः। धुवं न शेते वसतीरमर्षात्॥