No amount of learning or study can suppress the manifestations of temperament, even if they turn out to be clearly irrational. There is no problem with this; on the contrary: it would be undesirable to suppress them, since temperament is an important part of personality. The problem begins when the individual is mistaken and tries to convince others that he has managed, through study, to subdue his nerves, and as a result, what he says can only be grounded in the brightest reason. Well, there are better jokes! But one must reach intellectual maturity to properly appreciate personality and delight in it as Goethe did.