When one sits up, there is a feeling of up. When one sits down, there is a set of sensations that one perceives as stability, safe, grounded. These feelings and the human interpretation of them are naturally occurring.
Awareness is too.
When one is meditating, or concentrating on a project, reading a good book of any kind, or contemplating, time is flexible. It morphs and dissolves, sometimes stands still and in others is an elongated sustention.
Time is actually timeless, and Awareness is too.
We meditate with “naturally occurring timeless awareness.” (thank you, Longchenpa)