Hexagram Yi-King 19.
Gallery of logic facial emotions.

If you are linguist who study semiotics of languages then you can consider hexagrams Yi-King and symbols of human emotions as sign system which is original writing and is equivalent to many other sets of written characters.
In essence physical features of a human face and symbols of emotions designate mimic movements, and consequently are signs of nonverbal communication, that is possible to compare to pictographic writing or alphabetic systems of human speech.

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Features of a face and associations of emotional conditions.
Eyebrows: dreams are not caused by fantasy / sensible thinking.
Eyes: objective world vision / realistic illusions of outlook.
Mouth: feelings have no validity / sensations do not correlate with reality.

Even if the objective world defines sensible dreams then nevertheless feelings can be not real.

Formulas of analytical philosophy.
1 (eyes) obligatory opportunity is (eyebrows) conceivable probability of (mouth) unreal event.
2 (eyebrows) absolute ideas are (eyes) actual prototypes of (mouth) inexplicable world.
3 (eyebrows) intelligent knowledge is (eyes) true reflections of (mouth) unknown reality.
4 (eyebrows) considered imaginations are (eyes) promising anticipations of (mouth) seeming validity.

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Following 20 symbol of physiognomy.
About facial emotions as a sign system of nonverbal communication and physiognomy as pictographic writing, and also art works of literature.