Srimad Bhagavatam Canto 11, Chapter 22, Text 33

SB 11.22.33

yo ’sau guna-ksobha-krto vikarah
 pradhana-mulan mahatah prasutah
aham tri-vrn moha-vikalpa-hetur
 vaikarikas tamasa aindriyas ca
 
Translation: 
 
When the three modes of nature are agitated, the resultant transformation appears as the element false ego in three phases — goodness, passion and ignorance. Generated from the mahat-tattva, which is itself produced from the unmanifest pradhana, this false ego becomes the cause of all material illusion and duality.
 
Purport: 
 
By giving up one’s false ego of identification with the three modes of nature, one can achieve Krsna consciousness, the pure, original state of existence. The word moha-vikalpa-hetuh indicates that because of false ego one considers himself to be the enjoyer of nature and thus develops a false sense of material duality in terms of material happiness and distress. False ego is removed by identifying oneself as the Lord’s eternal servitor in full Krsna consciousness.
Srimad Bhagavatam Canto 11, Chapter 22, Text 32
Srimad Bhagavatam Canto 11, Chapter 22, Text 34