Describe symbolism in Mythologies by Roland Barthes

In the film, Julius Caesar, the author notes that perspiration is a symbol of the way the characters are all going through some kind of moral/intellectual crisis.

In the essay, The Romans in Films, is a response to the author's viewing a film version of Shakespeare's play, Julius Caesar. The essay begins with a specific commentary on what he sees as two powerful symbols in the film. The first, is the particularly and universally Roman way (Roman, that is, as interpreted by Hollywood) in which the male characters style their hair—in other words, hair in the film defines socio-cultural identity. He also suggests that the way the two female
characters in the film wear their hair is also symbolic. The messy hair of the youthful Portia, and the carefully braided, but over one shoulder, hair of Calpurnia represent the asymmetry and confusion of all the characters, and of the Rome in which the story is set.