We can make our own maps.

 Unlocking the Mystery of Paris' Most Secret Underground Society:

Despite their unassailable secrecy, UX still have something to offer the rest of us, trapped on the far side of the smokescreen. . . .

The organization simply tries things. If one idea doesn't work, they move on to the next. And whereas doubt inhibits, precedents inspire new experiments. . . . We cannot join UX. They will not tell us who they are, or what lies at the heart of the maze. But we can do as they did. We can make our own maps.