ALL THAT HAPPENS MUST BE KNOWN
It is one of the earlier aphorisms we see in The Circle, probably, as the story goes on, one of the least... unsettling (surprising, I know). It is here we start to get a feel of what The Circle (as a company) entails. The practices and words that seem to make them tick. It shows the reader just a taste of what we're in for (granted, the everything that happens afterwards doesn't compare, but still...).
To explain a bit further, it's all knowing every aspect in the world around them. It could be history, or it could be what's happening in the thrilling of little Timmy and his training wheel saga in the next town over. They don't care how large scale or small scale the information is, they still want to know, want it to be available for public consumption.
It's still a bit creepy nonetheless. I won't deny that. All that happens must be known? So if you really want to know if Kathy picked her nose, or if Amber broke a nail on her way through the turnstile? These are things that must be known?
Certain things, sure. But not all the things... Right?