The heart-field of that finely wrought thing is worthy of a stroll, whose every fragment holds the trace of a mighty arrow.

This profound couplet speaks to the deceptive nature of beauty. The poet suggests that a piece of fabric (or perhaps a relationship/person) might look beautiful enough to be admired and walked around, but upon closer inspection, every single thread, every detail, holds a sharp arrow. It is a powerful warning that what appears lovely on the surface often conceals deep pain or danger within.