Faber says he bears some responsibility for the dismal state of the world. what is the source of fabers guilt?

Faber´s guilt comes from his inability to act and his shyness, he is way too hard on himself though, and there´s so much only one person can do, even as he faced the odds he did.

His cowardice is really the source of his shyness, he can´t even go to Montag printer friend without having him on the earpiece, he is one of the few intellectuals left in their society ,he´s not very responsible though as they were fighting a losing battle.  

And even if he had done more, it would´ve been meaningless because the minds of the people wouldn´t had been swayed by the voice of one more person.

i got ypu

explanation:

cockroaches and rats often are a symbol for things that are disgusting or vile. though i don't know which play you are talking about, i hope this !