The poetspeaks about the advice that speaker's father has bestowed upon him/her in childhood. The advice given by the father was to be silent. The literarydeviceused in this line is connotation.
Suddenly disappear. That conveys the thought that something so dramatic happened to society that the first amendment is gone. That should stir every American into finding out what this sentence is about. The first amendment is the backbone of American Democracy and should not ever be ignored.
