Answer:
I scribble forms of the finest letter, And repel elements of the harshest weather. I am an arrow-aimer and a dust-breaker.
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
In many years, not much has happened. In many minutes, a lot has happened. In one second, everything has happened.
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
My love, when I gaze on thy beautiful face. Careering along, yet always in place, the thought has often come into my mind. If I ever shall see thy glorious behind.
Break me and I am better immediately set and harder to be broken again.