Shamrock Shamrock A shamrock is a young sprig, used as a symbol of Ireland. Saint Patrick, Ireland's patron saint, is said to have used it as a metaphor for the Christian Holy Trinity. The name "shamrock" comes from Irish , which is the diminutive of the Irish word for plant () and means simply "little plant" or "young plant". "Shamrock" usually refers to either the species (lesser clover, Irish: ) or (white clover, Irish: ). However, other three-leaved plants—such as , , and —are sometimes called shamrocks. The shamrock was traditionally used for its medicinal properties and was a popular motif
What Is and What Should Never Be descending riff [of "What Is and What Should Never Be"] is amazing: It's like a bow is being drawn back, and then it releases. The rhythm of the vocals is almost like a rap. It's insane — one of their most psychedelic songs." This was also one of the first songs recorded by the band for which Robert Plant received writing credit. According to rock journalist Stephen Davis, the author of the Led Zeppelin biography "Hammer of the Gods: The Led Zeppelin Saga", the lyrics for this song reflect a romance Plant had with his wife's younger sister. "What Is