Mahabharata 5.34.59

अनर्थमर्थतः पश्यन्नर्थं चैवाप्यनर्थतःइन्द्रियैः प्रसृतो बालः सुदुःखं मन्यते सुखम्

anarthamarthataḥ paśyannarthaṃ caivāpyanarthataḥindriyaiḥ prasṛto bālaḥ suduḥkhaṃ manyate sukham

Our plain-language meaning of this verse is waiting for scholar review.