"Heart-to-heart" comes from an allusion: According to legend, Pei Du was down and out in the Tang Dynasty. One day, I ran into thich nhat hanh on the road. After seeing Pedro's face, the master found that the longitudinal stripes of Pedro's mouth extended all the way to the entrance, fearing that he would starve to death. Therefore, he urged Pei Du to make efforts to cultivate goodness. Pei Du followed the teachings and met thich nhat hanh again in the future. The master saw that Pei Du's eyes were clear and his face changed completely, so he told him that he would definitely become prime minister in the future. According to the master's original intention, the reason why Pei Du's face changed so much before and after was because he constantly cultivated good and evil, cultivated his mind and changed his mind.

From a psychological point of view, everyone's face reflects their corresponding physiological and psychological state. For example, a person who is healthy and happy in body and mind is usually full of heaven, red and radiant in appearance. On the contrary, a sick or distressed person is usually sad, which is mostly difficult to have a satisfactory thing. Vision is the heart, face is the heart, this is the truth.