I would also cite an interesting example, though I can't source it. I remember a recent story (at least the last few decades) where some of the Tibetans were imprisoned by the Chinese. One of them was a Lama who practiced Dzogchen. Though of course they were prohibited from practicing Buddhism in the prison, he successfully taught the other prisoners Dzogchen and they all attained realization of rigpa. If all things are rigpa, the crux of the matter is failing to recognize the suchness of the situation. But our delusions are only sustained by our belief in them, so when practicing the meditation of non-meditation, one simply sits and relaxes presently and, as Tilopa put it
Let go of what has passed
Let go of what may come
Let go of the present
Do not try to figure anything out
Do not try to make anything happen
Relax, right now, and rest.
To accept or deny any phenomena that arise is not the practice, the practice isn't even a practice. Any thing is just a mental hologram. Like when we used to not read, we didnt see words, then we learned slowly how to pronounce and read, now we dont even read, we simply recognize the words. This is because our mind stores mental pictures of what things are and superimposes them onto the raw sensory data collected by the sense organs. Same goes for anything else, there is a mental image of what something is and we experience concrete things, but we are really only experiencing these images (not just visual images, naturally). Our problem is investment in these holograms as actually real.
So, goal oriented practice only continues to sustain our ideas that things are the way they are and there is an escape from these things.
