Sentence:  To get most benefit from the four <WSD>"mythoi</WSD>", one must avoid making two errors. First, a work embodying the comic <WSD>"mythos</WSD>" may be called comic but should not be confused with comedy since the latter term has too many meanings that are exclusively dramatic. The same stricture applies to tragedy and the tragic <WSD>"mythos</WSD>". The second error is to assume that a work embodying the ironic <WSD>"mythos</WSD>" is an anti-romance. 
Meaning of the word marked with <WSD> tags:  A recurring theme; a motif.