This quote is an example of characterization as it explains the type of character Fortunato is "a man to be respected and even feared." It should be noted that Fortunato's name is an example of irony because in the end he is not fortunate.
My heart is filled with joy just at the prospect of seeing you this holiday but alas it pains me to say I cannot be part of the festivities this time around. I have contracted a terrible flu this winter and would not want you or your familiy to suffer through my pain and agony!