The forty-four Letters to Friends of the Spirit were sent in five languages in the form of "Briefs," on a weekly basis, during the periods of restricted freedoms in 2021, to members of initiatory, Masonic, Martinist, Gnostic, Pythagorean, Rose-Croix, Swedenborgian, and other organizations in order to support practice.It is a meandering through the traditional world, the unique golden thread of which is nonduality. A stroll through a labyrinth of doors...