What will never be is broad. Some are easy. I won't be President, I won't likely travel in space, I won't ever look like BigSetx, and a long series of things that are simply not possible.
There are other things that will never be such as unrequited loves, lost loves, people who died before their time leaving untold promise destroyed, and my most despised loss - failure to grasp opportunity.
Still another loss, with which I am personally acquainted, is unrecoverable time and energy burnt up upon the pyre of fear and timidity. In some measure what can never be (at least for me) was sacrificed to these demons before it was possible to know them for what they are.
The balancer is unexpected promise. For every thing that will never be there is another thing that will be. In those endless movements from potential to kinetic there lies the implication of bitter disappointment and delightful surprise.
One of the things for me that "was never going to happen" was being in a committed relationship. Instead, when I least expected it to happen, I wake up and find that on 3rd March 2009 I will have been in love for every femtosecond of 10 years. Wow that wasn't supposed to happen.
Is there a benefit to letting go of things that will never be? Of this I am not entirely certain. Letting go of things that are impossible and don't really matter is one thing, and it isn't all that hard to do. However, the need itself to let go of something as a conscious act suggests to me that it may be worth retaining. That never be may never be, or more likely it will be a something else.
The something else, to my way of thinking, depends alot on how I approach the business of doing ever little thing.