Śrīmad-Bhāgavatam · Text 11.29.2
Who is speaking and story frame
प्रायश: पुण्डरीकाक्ष युञ्जन्ते योगिनो मन: ।
विषीदन्त्यसमाधानान्मनोनिग्रहकर्शिता: ॥ २ ॥
prāyaśaḥ puṇḍarīkākṣa
yuñjanto yogino manaḥ
viṣīdanty asamādhānān
mano-nigraha-karśitāḥ
O lotus-eyed Lord, generally those yogīs who try to steady the mind experience frustration because of their inability to perfect the state of trance. Thus they weary in their attempt to bring the mind under control.
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.