It seemed to me that if Tournier had wanted to portray The Secret in this painting it should be fairly easy to backtrack IF you knew what you were looking for, to that end I present these

Here is a nice clear larger image I found on line:



Now with the diameter of the red circle set to the width of the cross and the left downward line of the pentagram following the line of the foot of Jesus here is what emerges



and with a little bit of poetic license I thought that the place of intersection could be where the wound was inflicted so I added this ...



I think I have presented ample food for thought that part of the mystery and the things these painters were learning about in Rome was The Secret of The Saccred Code and that was ... Phi !

db

"There is nothing as impenetrable as a closed mind"
and ..." if everything is a coincidence what is the point of studying or measuring or analyzing anything ?" db