Śrīmad-Bhāgavatam · Text 11.23.59
Who is speaking and story frame
सुखदु:खप्रदो नान्य: पुरुषस्यात्मविभ्रम: ।
मित्रोदासीनरिपव: संसारस्तमस: कृत: ॥ ५९ ॥
sukha-duḥkha-prado nānyaḥ
puruṣasyātma-vibhramaḥ
mitrodāsīna-ripavaḥ
saṁsāras tamasaḥ kṛtaḥ
No other force besides his own mental confusion makes the soul experience happiness and distress. His perception of friends, neutral parties and enemies and the whole material life he builds around this perception are simply created out of ignorance.
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.