न विषादे मनः कार्यम् विषादो दोषवत्तरः | विषादो हन्ति पुरुषम् बालम् क्रुद्ध इव उरगः || ४-६४-९
Na vishaade manah kaaryam vishaado doshavattarah Vishaado hanti purusham baalam kruddhah ivoragah
Loosing heart to dismay is an unworkability, because dismaying itself is detrimental, and dismay alone ruins a person, as a vicious viper unworkably ruins an innocent child.