During the obligation, what does the candidate promise to conceal?

The correct choice pertains to the promise the candidate makes regarding the secret arts of Masonry. In the context of the Masonic initiation, the obligation emphasizes the importance of confidentiality regarding the rituals, symbols, and teachings that are unique to the organization. By promising to conceal the secret arts, the candidate acknowledges the sacredness and significance of Masonry's practices, which are meant to be shared only among initiated members.

This promise of secrecy reinforces the bond among members and protects the integrity of the fraternity. It reflects a commitment to uphold Masonic values and to respect the traditions and knowledge that have been passed down through generations. The other options, while they may seem relevant, do not capture the essence of what is specifically promised during the obligation in the context of Masonic teachings.