Śrīmad-Bhāgavatam · Text 11.10.18
Who is speaking and story frame
न देहिनां सुखं किञ्चिद् विद्यते विदुषामपि ।
तथा च दु:खं मूढानां वृथाहङ्करणं परम् ॥ १८ ॥
na dehināṁ sukhaṁ kiñcid
vidyate viduṣām api
tathā ca duḥkhaṁ mūḍhānāṁ
vṛthāhaṅkaraṇaṁ param
It is observed within the material world that sometimes even an intelligent person is not happy. Similarly, sometimes even a great fool is happy. The concept of becoming happy through expertly performing material activities is simply a useless exhibition of false egotism.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.