The Perception of Faces

...maintaining Measure and Rule, which can caution us
not to rely too certainly upon it (since there are those
who have a Foolish Nature and are Wise: And there are
those who possess the Perception of a truly Wise Person,
and are in fact Fools: Similar to the deception by
the Old Portrait Observers, who weighed the Wisdom
in the perception of Socrates and Aesop.) However, it must
be affirmed that from this premise, many appropriate and
expressive Elements can be drawn for the Ability of
the Art of Painting; since one is always bound to
the clearest, the most feasible, and the most ingenious
invention serving the Truth of the depicted Story.
This Truth, for being known from certain History, remains
fixed; Therefore, from the Election of this Perception,
a certain Mental Image can be made, as soon as one
observes it in a painting of one or another Passion.
Those who then attribute the Wrath to Achilles, the
Inexorability to Agamemnon, the cunning Deceitfulness
to Ulysses, and the Intrepid Courage to Ajax,
or whatever character traits one seeks to portray, in which
the dull Sulleness or Foolhardiness must stand out;
They will often very successfully utilize several
Attributes, not only in the Nature, but especially in the
Perception of various Animals;
it is possibly more feasible for us when we wish
to address these matters from afar, marking with
preliminary mention, that the perception here
significantly aids in understanding the Nature of Animals,
from which some perception can be attributed to Humans...

Translation Notes: 'Sweming' is translated as 'Perception' in the context of distinguishing traits or expressions, in line with artistic depiction and study of faces.