Letting go - a lesson from the Bhagavad Gita

I am reading the Bhagavad Gita. It is an amazing read. Stephen Mitchell writes:

"The subject is (sic) after all , a matter of the gravest urgency: the battle for authenticity, the life and death of the soul.  And in all spiritual practice, the struggle against greed, hatred, and ignorance, against the ingrained selfishness that has covered our natural luminosity...the spiritual mature human being lets all things come and go without effort, without desire for any foreseen result."

In Hinduism, as in other spiritual tomes, "the idea that there is a goal...is wrong. We are the goal...it is about letting go of the fruits of action...renunciation of the fruits of action, Ghandi wrote, "is the center around which the Gita is woven"

In the Gita, this essence of Hinduism, to let go,reads as follows:

You have a right to your actions,
but never to your actions' fruits
Act for the action's sake
And do not be attached to inaction.
Self-possessed, resolute, act
without any thoughts of results
Open to success or failure.