Mahamudra is knowing that
all things are one's own mind.
Seeing objects as external is just noetic projection.
The whole of "appearance" is as empty as a dream.
The mind as such is merely a flow of awareness,
without self-nature, moving where it will like the wind.
Empty of an identity, it is like space.
All phenomena, like space, are the same.
That which is termed Mahamudra,
Is not a "thing" that can be pointed to.
It is the mind's own nature
that is Mahamudra [i.e., the Absolute State].
Natural Awareness: Mahamudra texts
http://www.naturalawareness.net/mahamudra.html