It is but proper, O Yudhishthira, that you should be possessed by peaceful sentiments, since their deeds and Nature are the ruling causes of happiness and misery to even insects and ants.
यदा प्रमाणं प्रसवः स्वभावश्च सुखासुखे। दंशकीटपिपीलानां स्थिरो भव युधिष्ठिर॥