In Macbeth, there are real knives and imagined knives; knives that kill and knives that simply threaten. The latter plays a greater role in accessing your ability to analyze a literary work.
A conclusion should open up your highly specific, focused discussion, but it should do so without drawing a sweeping lesson about life or human nature. Unlike an emblem, a symbol may have different meanings in different contexts.
An introduction can vary in length depending on the overall length of the essay, but in a traditional five-paragraph essay it should be no longer than one paragraph.
It can be either a paraphrase of content or direct quotation from a book. Keep track of passages, symbols, images, or scenes that deal with your topic. In your introduction, you made a case for why your topic and position are important. Move from the specific to the general.