Your friend will soon enough understand whether a life of such learning and practice is beautiful in his eyes. I have recently seen Empire products at BJs and in supermarkets at prices that are considerably better than offered at the local kosher stores. It's not clear to me how it came to mean mushroom in Arabic, maybe it would be clear to an Arabic speaker. Stan also asks if there is any connection to Greek pater and Peter. These words themselves are not related to each other.
Pater comes from the Indoeuropean word for father.
Peter comes from Greek petros, meaning rock, and is of obscure origin according to my etymological dictionaries. R. Menachem Mendel Kasher's monograph on the International Date Line. All those halakhot that are derived from geocentric presuppositions, and that are known to me, can readily be reinterpreted so as NOT to depend on dubious scientific foundations. The absence of Nevuah is one obvious example of this principle. This would provide greater understanding of how his own students understood Rav Kook in this important area.