Sri Krishna relates to Arjuna in Bhagavadgita (Ch.2.62 & 63), on the battlefield of Kurukshetra in Mahabharata that:
Dhyayato vishayaan pumsah, vangas teshupa jaayate Sangaat sanjaayate kaamah, kaamat krodhobhi jaayate Krodhad bhavati sammohah, sammohat smriti vibramaha Smriti bhramsaad buddhi nasho, buddhi maashaat pranasyat
While contemplating material and sensual objects, persons become attached to them. Such attachment develops lust and lust generates anger. Anger leads to delusion and delusion to mental bewilderment. When the mind is bewildered, intelligence and discretion is lost. Loss of intelligence and discretion leads to downfall of the person.
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