Composed probably in 1606, Shakespeare’s use of the word “epicure” in "Macbeth" is particularly interesting because at that time, “epicure” was considered “archaic” that is, rare in the early 1600s present-day usage. The meaning of Shakespeare’s “epicure” is taken from the philosophy of an ancient Greek philosopher, Epicurus (341–270 B.C.E.) An “epicure” is a person that disbelieves in God (the divine government of the world,) and in an afterlife spent in either Heaven or Hell; this is also a person who recognizes no religious motives for conduct.
In Act IV, Scene III of Shakespeare’s “The Tragedy of Macbeth,” Malcolm tells Macduff that even someone who has morals and integrity may cave under the pressure of a demand from their king. Malcolm is referring to Lucifer (the Devil.) In most religious traditions, Lucifer is considered the most intelligent (the brightest as in genius) and the most outstanding (the brightest or best) of God’s angels. In addition, Malcolm is saying that Macbeth was once the brightest and best and now he acts a lot like Lucifer.