Think of Freemasonry as a brotherhood built around initiation ceremonies and traditions, rather than your typical social club. The big principles are brotherly love, helping others, and truth, alongside faith, hope, charity, and treating people equally.
Members progress through three degrees: Entered Apprentice, Fellowcraft, and Master Mason. Each ceremony works almost like a little stage production, using a fictional narrative surrounding King Solomon's Temple being built to get moral lessons across. Along the way, members promise not to disclose much of what happens, including particular signs, handshakes, and passwords. Funny thing is, you can Google most of that stuff in half a minute. Keeping people genuinely clueless isn't really...