Not to coop the thread but hopefully, not objectional to Phantom.. this quote from a preliminary practice, part of the natural liberation of the nature of mind...which seems to hit to my opinion on the same issues a bit, though not a mahamudra text or reference....
All phenomena are (ultimately) selfless, empty, and free from conceptual elaboration.
In their dynamic they resemble an illusion, mirage, dream, or reflected image,
A celestial city, an echo, a reflection of the moon in water, a bubble, an optical illlusion, or an untangible emanation,
You should know that all things of cyclic existence and nirvana
Accord (in nature) with these tenb similies of illusory phenomena,
All phenomena ae naturally uncreated,
They neither abide nor cease, neither come nor go,
They are without objective referent, signless, inaffable, and free from thought.
The time has come for this truth to be realized!
Or from a similiar source:
Be certain that conceptual thoughts and fleeting memories are not strictly identifiable,
But insubstantial in their motion, like the breezes of the atmosphere.
Look at your own mind to see whether it is like that or not!
"This order considers that progress can be achieved more rapidly during a single month of self-transformation through terrifying conditions in rough terrain and in "the abode of harmful forces" than through meditating for a period of three years in towns and monasteries"....Takpo Tashi Namgyal.