Arthashastra
शौर्यम् अमर्षः शीघ्रता दाक्ष्यं च उत्साह गुणाः ॥
Valour, determination of purpose, quickness, and probity are the aspects of enthusiasm.
english translation
zauryam amarSaH zIghratA dAkSyaM ca utsAha guNAH ॥
hk transliteration by Sanscript