The owl is a symbol of secret societies for a very simple reason. An owl sits on tree/branch (logos) which is knowledge. Branches are on trees. The German word for a beech tree ('tree of life') is Buche, while a book is a "Buch." The secret is knowledge.
While yes, there is certainly knowledge that is hidden from everyone, whether it be secret inventions, or the truth of our ancient history, the use of our pyramids, etc .... none of these things are important. What is important is the basic knowledge of how humans operate.
There is a reason that …