Time.
We can’t see it, we can’t hear it,
we can’t weigh it, we can’t measure it in a laboratory.
It is a subjective sense of becoming what we are,
instead of what we were a nanosecond ago,
becoming what we will be in another nanosecond.
The Hopis see time as a landscape:
existing before and behind us, and we move — we move through it,

Slice by slice.

[The man from Earth]