तृष्णार्तिप्रभवं दुःखं दुःखार्तिप्रभवं सुखम् ।
सुखात्सञ्जायते दुःखमेवमेतत्पुनः पुनः ॥
tṛṣṇārti-prabhavaṁ duḥkhaṁ duḥkhārti-prabhavaṁ sukham |
sukhāt sañjāyate duḥkham evam etat punaḥ punaḥ ||
(Mahābhārata: 12.168.18)
“Unhappiness is caused by the distress of desire, and happiness is caused by the distress of unhappiness. Unhappiness is produced from happiness. Thus, this occurs again and again.”