在西游记中，唐僧和西天取经的关系是什么？
唐僧的旅程 intricately defined by the mission of 西天取经, which serves as a central theme in both his narrative and character purpose. This mission not only drives 唐僧 but also influences his disciples, shaping their journey and the encounters they face along the way. Thus, 西天取经 is fundamental to the experiences and development of 唐僧 and his followers.