
The clenched fist won't pass, through the opening. When the hunters come, the monkey becomes frantic but cannot get away. There is no one keeping that monkey captive, except the force of its own attachment. All that it has to do is to open the hand. But so strong is the force of greed in the mind that it is a rare monkey which can let go.
It is the desires and clinging in our minds which keep us trapped. All we need to do is to open our hands, let go of our selves, our attachment and be free.