The real problem, however, does not lie in any particular kind of activity or experience, but in maintaining the secret hope that what I want can be made stable, secure, and permanent. This has never worked, yet we continue to hope that somehow, maybe, this next time will lead to permanent happiness. That is what must be surrendered. Not because it's bad, or immoral, or spiritually incorrect, but simply because it doesn't work. It doesn't work that way simply because life is, by nature, constant flow and interaction of numberless elements.
Nothing ever stays the same, even from one moment to the next.
Everything is on its way to becoming something else, and therefore, nothing can be held onto. If you see this clearly, if you consider and examine this deeply and fully, then letting go is the only thing left to do. So the art of spiritual surrender is really the art of not knowing. Then it doesn't make any difference at all whether you are walking down the street or eating lunch or responding to your email or making love or sitting alone on your couch. This is the first and last time you will ever be doing this.