Like the older, Latin-letter fraternities, the Phi Beta Kappa was a secret society. To protect its members and to instill a sense of solidarity, each had the essential attributes of most modern fraternities: an oath of secrecy, a badge (or token) and a diploma (or certificate) of membership, mottoes (in the case of the Phi Beta Kappa, in Greek rather than in Latin), a ritual of initiation, a handclasp of recognition; to these, the Phi Beta Kappa would soon add another attribute, branches or "chapters" at other colleges. The new society was given the motto, or in Latin letters "", which means in English "Love of learning is the guide of life". Greek was chosen, because Greek was in Roman times the language of science like Latin in medieval times.