Carl Phillips, from the 2nd stanza of "On Restraint"

There are horses in the distance, so say so.

There are horses in the distance,
not running, smoke-still.

Not running yet: the idea of To run.

Not running but getting ready to run.

There are no horses in the distance, but
say so.

There is smoke,

or a fog that, from this distance,
is any number of horses, not running.