The "Eight Consciousnesses" is a conceptual model of the Yogacara, or Mind-Only school of Buddhism that divides consciousness into eight types as a way of working with mind. The seventh consciousness, often called "klesa mind" or the ego identity, tends to solidify the illusion of a self separate and other by grasping, rejecting, or ignoring how this appears. In sitting meditation, we work with the mind by holding still and practice just observing that which appears.

https://www.youtube.com/watch?v=zkaooyRDLDs