<span>The correct answer is allusion.
Remember that an allusion is a reference to a well-known piece of literature or history. The teacher's words are an example of an allusion because he is referencing the Bible, or a book that is sacred to many.
By comparing his syllabus to the Bible, he is saying that the syllabus should be sacred to his students. His students need to keep this syllabus safe and refer to it often, much like Christians do with the Bible.</span>
To my knowledge of literally devices that would be an idiom, because it is a saying for something common!!
Answer:
Brave is the best trait that describes the character of Antigone.