There is a lot to do about the secret of Freemasonry, something that has lead to speculations and conspiracy thinking. In stead of a secret society, Freemasonry is a closed society with a secret. It concerns the individual experience. What this is, is hard to explain, it is different for each individual.
Rituals are performed in a Temple: a place where one can look for wisdom which, when employed in daily life with strength, can lead to beauty. The Temple and her different parts have a physical meaning, and are metaphors for the human body and life in its totality.
Freemasons still work on their craft, not with a visible or feasible result, but they work on an invisible, symbolic Temple consisting of human beings: The Temple of Humanity.