From Shamarpa

Before we begin to meditate, we should understand something about the qualities of mind, what the mind actually is. The mind is not a thing – it is not a material substance, a fixed object. It is comprised of the nature of knowing. It has this capacity. The mind is simply a succession of moments of consciousness, moments of awareness or moments of knowing. In essence, the mind is without obstructi

on, it is vast, it is unlimited. The mind is not an entity that exists as such and that lasts for a certain length of time. As the mind enters into relationship with objects, there arise a series of ever-changing instances of perception; therefore, the mind is not one continuous thing – it is impermanent. ~ Kunzig Shamar Rinpoche (Shamarpa)