In a certain theme park, there is an ‘exhibition’ shall we say of pearl diving where gullible, I mean excited tourists can pay money to have a ‘diver’ retrieve an oyster to get a pearl. At this time, the barker will urge people to say “Opa Opa Oyster”, of course which no one over the age of five actually does; but you have to admire their earnestness, enthusiasm and persistence. It takes a certain type of oyster to produce a pearl, not all oysters do. Likewise, not all people provide an oyster so to speak. Always seek out those that have good characteristics that can be a positive influence upon you. Be wise about the oysters that you hang around with.