books.google.it - Pythagoras (fl. 500 B.C.), the first man to call himself a philosopher or lover of wisdom, was both a brilliant mathematician and spiritual teacher. This anthology, the largest collection of Pythagorean writings ever to appear in the English language, contains the four ancient biographies of Pythagoras...http://books.google.it/books/about/The_Pythagorean_Sourcebook_and_Library.html?hl=it&id=EigQoSZCUAwC&q=intelligible&utm_source=gb-gplus-shareThe Pythagorean Sourcebook and Library
