Metaphysical reality

According to Wikipedia one work Salvator Mundi, Latin for Saviour of the World, is a subject in iconography depicting Christ with his right hand raised in blessing and his left hand holding an orb surmounted by a cross, known as a globus cruciger. The latter symbolizes the Earth. ...cross quote.
This was related to the novice student's exercise to develop clairvoyant aplity. This was a completely rational activity, like learning to play.
To read this you can, for example from Rudolf Steiner, Max Heindel or Annie Besant or Pekka Ervast.
Wikpedia continues:

And the whole composition has strong eschatological undertones. ...

Perfect nonsense!
The position of the fingers in the other hand of Salvator Mundi tells about the right degree to which this exercise belongs.

The theme was degenerated by popular northern painters such as Jan van Eyck, Hans Memling, and Albrecht Dürer. There are also several versions of the theme attributed to Titian. He was on the yard with this.
He did not even know why the ball in the picture is transparent.
But Leonardo knew what he painted.
He was one of the initiationed.
True Salvator Mundi, in Renaissance dress, is a painting by Leonardo da Vinci, dated to c. 1500. This painting disappeared from 1763 until 1900, when it was acquired from Sir Charles Robinson. Robinson purchased the picture as a work by Leonardo's follower, Bernardino Luini, for the Doughty House in Richmond, London. By this time Christ's face and hair had been extensively repainted. A photograph taken in 1912 records the work's altered appearance.
2017, this painting sold at auction for $450,300,000, the highest price ever paid for a painting. A painting of the subject was attributed or reattributed to Leonardo da Vinci in 2011.