Complex sentence: At this time, Pirsig's understanding of Quality became "crystallized" while participating in a Native American Church peyote ceremony and, from this initial crystallization, the Metaphysics of Quality was eventually formulated.
Split into simpler sentences: At this time, Pirsig's understanding of Quality "crystallized" while participating in a Native American Church peyote ceremony. From this initial crystallization, the Metaphysics of Quality was eventually formulated.