Peter Angus Medlock

“While sitting cross-legged on a comfortable cushion, consider for a while that there are two kinds of entities: physical and nonphysical. Physical things are aggregations of elementary particles, but if those are broken down and deconstructed by way of their directional components, not even the subtlest remains, nor does it appear at all. Something nonphysical is the mind. But even with this, the past mind has ceased and is no more, the future mind has not yet arisen nor has it emerged, and the present mind is extremely difficult to investigate. It has no color and is devoid of form. Being like space, it is indeterminate. Moreover, since it is neither singular nor plural, or else since it is unoriginated, or else since it is by nature clear light, and so forth, when you analyze and deconstruct it with the weapons of reasoning, you will realize that it is indeterminate.”
― B. Alan Wallace, Samatha and Vipasyana: An Anthology of Pith Instructions