His Achilles Heel

After reading this passage, I was reminded of something that I read in the Humoural Personality Test:

"...a surplus (over 30%) of choler can become "burned" and eventually turn into melancholy (melan=black, choler=bile, in Greek). Meanwhile, the choleric will become acrid and negative; reactivity might be directed at the wrong objects"

Coriolanus seems to be too harsh on his family when he says, "I'll never/Be such a gosling to obey instinct, but stand/As if a man were author of himself/And knew no other kin." He is snubbing his family, and by doing so he is directing his anger "at the wrong objects," when really he should be heeding what his closest friends (Menenius) and family have to say because they're the only ones he can trust.

Also, Coriolanus recognizes that he is weak and spineless against his mother when he says "I melt, and am not/Of stronger earth than others" and "My mother bows,/As if Olympus to a molehill should/In supplication nod." His self-consciousness of the fact that he is not as strong as most people make him out to be portrays him as a humble man with faults just like any other, which is exactly what Shakespeare wanted in order to procure sympathy from the audience for the tragic hero.