A famous anecdote about the way you catch monkeys in India, goes like this:

If you put a handful of nuts into a jar with a small opening. The monkey puts his hands in the jar, grabs the nuts, and then finds that he can't get his fist out through the small opening. If the monkey would let go of the nuts, he could escape, but he won't. He's attached!

Attachment leads to suffering, Detachment leads to freedom. It's as simple as that.

In the Bhagadvagita, Krishna tells Arjuna that acting with detachment means doing things for their own sake, because they need to be done, without worrying about the results.

Perhaps that is most difficult: To not be attached to the outcome of endeavors that we pursue. "Letting go" of results is a practice. When one truly masters this, he will experience a rich freedom in life. I'm still practicing (Lol)!

Letting go does not have to mean loosing your grip. But it can mean relaxing enough to create some space. That fresh space is where possibilities live. And opening to that is the best letting go of all.