And the light breeze moves me to caress her long earThat is delicate as the skin over a girl's wrist. (20-21)
Just as the breeze caresses the speaker, the speaker caresses the pony, making a further connection to the memory of caressing a girl's wrist. Sometimes, when two people are in love, they say, "This love is bigger than the both of us." That certainly seems to be the case in this situation. This speaker's interaction with the ponies seems to have triggered a mysterious current of loving energy that flows freely not only through the ponies and the people, but also through the universe at large.