Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 59

Sanskrit:

सुखदु:खप्रदो नान्य: पुरुषस्यात्मविभ्रम: ।मित्रोदासीनरिपव: संसारस्तमस: कृत: ॥ ५९ ॥

ITRANS:

sukha-duḥkha-prado nānyaḥpuruṣasyātma-vibhramaḥmitrodāsīna-ripavaḥsaṁsāras tamasaḥ kṛtaḥ

Translation:

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.

Purport:

Everyone is working hard to please their friends, defeat their enemies and maintain the status quo with neutral parties. These relations are certainly based on the material body and do not exist beyond the body’s inevitable demise. They are called ignorance, or material illusion.