Mind is not physical. While mind works in coordination with the physical body, mind itself has no form or shape. Mind functions to perceive reality. By nature it is clear and luminous, perceiving and reflecting reality like a mirror. But like a dirty rag rubbing oil over a mirror, our negativities can temporarily cloud and block the capacity of the mind to perceive reality purely. There are also multiple levels of mind.
Underlying the gross mind—which we ordinarily see and which is easily affected by emotions—we have a subtler mind, and deeper still, an even subtler mind known as the primordial mind. In this lesson, Gelek Rimpoche explains that through the process of meditation, it can become possible to unlock these various aspects of mind.