faithful,+although+blind

 Faithful: firm in adherence to promises or in observance of duty The moon will always does the same thing. Every day, and every night, the moon follows the sun. I think that the author tries to show the blind faithfulness that the moon and the sun follow to chase eachother, every day and every night. It also might have something to do with life. Yin yang, the circle of life, the moon and the sun, the death of the sun and the birth of the moon, only to be followed by the death of the moon and the life of the sun.

Change is a critical piece of these poems, and using the sun and moon as motifs offers a familiar pairing!