If a person feels terrible, it usually should not be shown or acknowledged during a greeting exchange. Instead, the unhappy person is expected to conceal negative feelings, putting on a polite smile to accompany the โJust fine, thank you, and how are you?โ reply to the โHow are you today?โ The true feelings will probably go undetected, not because the smile is such a good mask but because in polite exchanges people rarely care how the other person actually feels.
Paul EkmanThe distinction between shame and guilt is very important, since these two emotions may tear a person in opposite directions. The wish to relieve guilt may motivate a confession, but the wish to avoid the humiliation of shame may prevent it.
Paul Ekman