Can a person judge a book by its cover?

In China, physiognomy links a person's face and facial features with human dignity, that is, exaggerating the role of mind in appearance and falling into an idealized situation?

From this point of view, there is some truth in the old saying that "all that glitters is not gold"?

However, in a sense, people can judge a book by its cover? Because a person's appearance is not only given by parents to a great extent, but also influenced by various environmental conditions and personal psychological quality.