Relentless Rhythm Shapes All This

Points on Earth back into day,
And day rises over them
Until they’re backing away

Back into evening and night.
Everything starts in the east,
And the west is for goodbyes,

As far as Earth is concerned.
Of course, some species can rush
Back and forth, some fast enough

To outrun the day or night,
For a short while, a few hours,
But most of the time, most time,

In fact, most of what time is
Amounts to time backing up.