According to the Master Mason's Obligation, secrets must be kept from whom?

The correct answer is that secrets must be kept from those not deemed lawful Brothers. In the context of Freemasonry, the Master Mason's Obligation emphasizes the importance of confidentiality regarding the rituals, teachings, and secrets of the fraternity. This obligation creates a bond of trust among members, ensuring that the knowledge and experiences shared within the organization are only accessible to those who have been formally initiated and recognized as lawful Brothers.

This principle not only protects the integrity of the Masonic teachings but also reinforces a sense of camaraderie and responsibility among members. By restricting access to this knowledge, Freemasonry maintains its traditions and principles, which are central to the identity of the organization.

While it might seem that the other options could suggest a more general approach to secrecy, they do not accurately reflect the specific guidelines of the Master Mason's Obligation, which is clearly focused on the boundary defined by lawful brotherhood. Therefore, the emphasis is on protecting Masonic secrets from those who have not undergone the necessary process of initiation and recognition.