It might sound counterintuitive at first glance, but there's a profound meaning behind the term "Non-meditation" used in Dzogchen teachings.
In most traditional forms of meditation, there's an objective or an aim, such as quieting the mind, focusing attention, or cultivating a certain mental state or quality like compassion, awareness, etc. There's generally a sense of effort, of 'doing' something.
However, in Dzogchen, the practice eventually leads us to a natural state where there's no striving, no 'meditator', no object of meditation, and no act of meditating. We simply abide in the natural state of our mind just as it is - clear, open, aware. This is the state of "Non-meditation."
Non-meditation is about transcending effort, judgment, striving, and subtly embedded dualistic conception where there's a separation between the observer and observed, between the 'meditator' and meditation'.
In this practice, we are not trying to change or achieve anything. We are simply recognizing and resting in the inherent, always already enlightened nature of our mind - which is Rigpa.
It is termed 'non-meditation' because in the fruition of our practice, we go beyond needing to 'meditate.' We are no longer caught up in the duality of 'meditation' and 'non-meditation.' We naturally abide and function from the state of Rigpa, whether we are sitting on the cushion, walking in nature, or going about our daily chores.
However, it's essential to note that 'non-meditation' does not imply carelessness or lack of discipline. Consistent practice with diligent observation is necessary to understand and embody this stage. It is a point of maturation in practice, not an excuse to be lax or to bypass meditation.