Well nobody should be surprised to learn that somebody they know has been keeping a secret--the secret that they are a Freemason. It is, afterall, an ancient and secretive society, and over hundreds of years Masons have learned to be very subtle. We blend in, invisible to all but other Masons, who are able to decipher the ingenious hidden signs. It is indeed a sharp non-Mason that manages to recognize one of these nearly invisible clues that someone they know may be a Freemason. It would be a nearly impossible feat for the uninitiated to pick one of us out of a crowd without knowing the hidden mysteries. We're like the wind--there but completely invisible.