In the 1960s, psychologist Paul Ekman identified seven universal emotions expressed the same way across all cultures. These expressions flash on the face for less than half a second before being masked. They are involuntary, and they are always honest.
The 7 universal micro-expressions
Happiness: raised cheeks, crow's feet, lips pulled back. The only emotion that is almost impossible to fake convincingly.
Sadness: inner eyebrows pulled up, lip corners turned down. Sadness is the hardest to mask because it involves muscles most people cannot control voluntarily.
Anger: eyebrows pulled down, lips thinned or pressed together, jaw clenched. Anger often appears as a flash before the person regains composure.
Fear: eyes wide open, eyebrows raised and pulled together, mouth slightly open. Fear and surprise look similar, but fear holds the eyebrows together.
Surprise: eyebrows raised, eyes wide, jaw drops. The key difference from fear: surprise is momentary and symmetrical.
Disgust: nose wrinkled, upper lip raised. Often confused with contempt, but disgust involves the nose area prominently.
Contempt: the only asymmetrical expression. One corner of the mouth rises. Contempt signals moral superiority and is the most dangerous expression in relationships.
How to train your eye
Start with one expression per week. This week, watch for contempt: the half-smile that is not a smile. Next week, focus on the fear-surprise distinction. You cannot learn all seven at once, but within two months, you will catch signals that most people miss entirely.
Context matters
A micro-expression alone is not a verdict. It is a data point. If someone flashes anger when discussing a "great" opportunity, that flash is worth investigating. Pair it with what they say and how they say it. The face, the voice, and the words should align. When they do not, the face is telling the truth.