Do favors
and don't expect
anything in return.
...
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This is great to know that you read the Holy Bhagwad Gita. This sacred scripture motivates mind towards greater realm and towards God. Any favour we do, we should do it without attachment and without any selfish motive. A selfless mind is motivated with selfless purpose. In such case divine feeling can be obtained well.
doing anything without expectation of exchange gives always the great peace inside heart