Our mind has two functions that it is capable of performing. The first is the ability to perceive and analyse phenomena in the outside world; the second is the ability to be aware of what one is perceiving. This second capacity is described as introspective awareness. It is like our hand being able to feel whether something is cold or hot, while at the same time we are aware that we are in that state of perception. In counting our breaths, on the one hand our mind is able to focus on counting, and at the same time it is able to experience a state of great calmness. This is what we refer to as mental equanimity.
[Depicted from "Life as Practical – Practical Instruction to the Lay Practitioner - Part 27" May 2015, Canada.]