The Moon has always fascinated humans and continues to be an inexhaustible source of unanswered questions, shrouded in its pale light in the night sky. Plutarch uses the term "apparent face" to analyze these hidden secrets of its identity and, as the high priest of the Oracle of Delphi, he undertakes to guide us on an initiatory tour of the "circle of the Moon," that is, its entire surface formed by both its visible and always unseen side, approaching and analyzing a series of mystical questions. Has the Moon always been in orbit around the Earth? What secrets are hidden on the unseen side of the Moon? Is there an atmosphere, water, and precious minerals on its surface? Could humans colonize the Moon, and perhaps have they done so in the past? How does the Moon control births and deaths on Earth and affect our lives? How is the Moon connected to the Eleusinian Mysteries of Demeter-Earth and Kore-Persephone-Moon? What really happens during eclipses? How is the cone of the shadow of eclipses connected to the conical pineal gland of humans? How is the Moon connected to the activation of our inner powers? How is the worship of the Olympian Gods connected to the Moon? How is the Moon connected to Saturn and the destruction of Atlantis? Did ancient Greeks inhabit America? How ancient is Greek civilization? How can Plutarch know all these secret knowledge? A book that, 2000 years after its writing, continues to contain unknown information about both the functioning of the Moon and the prehistory of the Earth, surpassing even the most vivid imagination! A book that revises our views on the meaning and purpose of our lives, the position of humans in the universe, and the highest scientific knowledge possessed by ancient Greece.