Originally Posted by
Jundo
In the Mahayana, emptiness is much more than only the lack of independent existence of things (although it is that too), but is also the wholeness and union of all things beyond all independent existence.
In traditional Buddhism, the cause is simply desire ... the desire that things be different from how they are. If we are satisfied with how things are, there is no suffering in a Buddhist sense, e.g., sickness, death or loss is only "suffering" (Dukkha) in a Buddhist sense when we desire not to be sick and do not accept the sickness, death or loss. The treatment (also found in Shikantaza) is radical equanimity accepting all conditions "just as it is."
So, it is a little different from "if we figure out the causes, phenomena, conditions that create our suffering we also find the way to eliminate it." We can do so in a worldly sense, for sure (e.g., if I find out the cause of my sickness, I can go to a doctor and get medicine, which is a good thing). But in Buddhism, the attitude is equanimity.
In the Mahayana, however, as seen by Ancestor Nagarjuna and the other Zen masters, there is no sickness, death or loss, and nobody to be sick or die, nothing to be gained or lost, in the wholeness of flowing emptiness ... just as there can be no loss or gain to the ocean even if waves rise or fall, waters appear to turn stormy or still, on its surface.
Both "treatments" for human suffering and "neurosis are found in Shikantaza in its radical equanimity, flowing with conditions, and dropping from mind of all thoughts of me and you, this and that, sickness vs. health, birth and death, plus or minus, gain or loss.
(sorry for running long, though "just what is" too).
Gassho, Jundo
STLah