The concept of seeing one's projected onto one's body, particularly the face, is found in the Zohar 2:70a and explained by Rav Moshe Miller here
"Now see to it" - look at the hair [which includes] the lines on the
forehead and the eyebrows. "From among all the people" - the eyes
[which includes] the layers of the eyes [i.e. the pupil, iris, and the
white of the eye] and the lines under the eye. "Men of stature" -
those who have the ability to stand in the halls of the King [this
alludes to] the glow of the face, at the face itself, [and] the lines
and folds of the face, and the beard. "Who hate corruption…" - the
hands, the lines and marks of the hands.
When Moshe Rabbenu was charged with finding judges for the nation, he looked at their faces to see the 'projection' of their soul.