As per the Indian philosophy of the Upanishads, the source of evil is one’s ego-sense –Ahankara—which differentiates oneself from the other selves. A person, who visualizes himself independent of others, tries to guard or please himself at the cost of others. Evil is thus the tendency of a person to live a life that is not ‘in harmony’ with the rest of the world, but ‘in opposition’ to it or at best ‘in indifference’ to it. The good is to discover the unity in the diversity of ‘all selves’ and beings. Once unity in diversity is realized, every being becomes our own self and good deeds follow automatically
Awdhesh Singh, Good and Evil: Two Sides of the Same Coin
ahamkara, evil, good, upanishads