Your expression will expose your character

2. Facial expressions decide individual personality

As mentioned above, people with different personality may show different expression with the same mood, or same environment. For example, when people encounter something worth celebrating, candid people may laugh, prudent man may be pleased inside, but they act very calmly, the pessimistic may feel unhappy inside, but in order to get attached to the others, they also make the smiling expressions.

3. Expressions can replace language

When people communicate, they communicate more in language, because by this way, it is more direct and clearer. But most of the time, we are told to say things in a tactful way. For example, you confessed your love to a girl, she told you, "You're excellent, but I think you deserve better."

Did she really think like that? As a matter of fact, she just didn’t want to accept you and she was afraid that she would hurt you. When you were expressing your love, verbal communication is so weak. Relatively speaking, observing the other person's expression will give you a clearer idea of the other person's thoughts.  In real life, people will show their real expression when they are lying. They are deliberately letting you notice that, however, some are not aware of expressing their real inside feelings.