Śrīmad-Bhāgavatam · Text 11.10.3
Who is speaking and story frame
सुप्तस्य विषयालोको ध्यायतो वा मनोरथ: ।
नानात्मकत्वाद् विफलस्तथा भेदात्मधीर्गुणै: ॥ ३ ॥
suptasya viṣayāloko
dhyāyato vā manorathaḥ
nānātmakatvād viphalas
tathā bhedātma-dhīr guṇaiḥ
One who is sleeping may see many objects of sense gratification in a dream, but such pleasurable things are merely creations of the mind and are thus ultimately useless. Similarly, the living entity who is asleep to his spiritual identity also sees many sense objects, but these innumerable objects of temporary gratification are creations of the Lord’s illusory potency and have no permanent existence. One who meditates upon them, impelled by the senses, uselessly engages his intelligence.
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.