Clinging to Philosophy is Not Mahamudra

It is possible to cling to any one of the [philosophical schools] by holding
onto your system as the only valid one, not seeing that all these tenets are
mere conceptual imputations, a great network of labels. These assertions
are based on attachment to your own philosophical position; however, the
philosophical position of the mahamudra is beyond this kind of conceptualizing.

When you cling to a position, taking it to be truly established (an enervating,
totally exhausting endeavor), your ability to see the fundamental nature of the
mind becomes obscured. In sum, when you assert or cling to your own
philosophical view, that in itself obscures the true nature of the mind, the very
thing you are trying to realize. The problem is the grasping, this prejudice
towards your own standpoint or understanding.

-From Mahamudra Shamatha and Vipashyana, Karmê Chöling,
Summer, 1991, p.18. Translated by Michele Martin.