Here he is saying he is in contact with the throne but still surpass those in his way. "For in it my way it lies". This line leads one to question what is it that lies in his way and could it perhaps be related to what his eye will fear.
The metaphor Macbeth uses in the third and fourth line, "Stars, hide your fires; Let not light see my black and deep desires" (1.4.57-58). Macbeth speaks in ambiguity here to confuse the reader and himself about what his true intentions are. These lines are ambiguous because the metaphors and opposition used. For instance, a literal meaning of his metaphor "let not light see my black and deep desires" would be that Macbeth wants there to be darkness so his dark personal secrets will not be exposed to the world around him. Another literal meaning would be for the stars to hide their fires through personification. With the stars not giving out their light all in the world would be dark. Macbeth prays for this for the sake that no one may see the dark, deep, and true secrets Macbeth holds, not even himself. This leads to the assumption that Macbeth plans to commit a crime that he would not normally do. He would do something out of character. "Let not light see my black and deep desires". The opposition between light and dark shows the two sides of Macbeth; His naive, kind-hearted side but also his ambitious, greedy side. Macbeth has two personalities, one being controlled by his naivety and the other by his ambition. Because the reader has previously determined he would do something out of character they can also see how he battles with himself to determine what he should do. He wants his naivete to remain and not see the truth behind his ambitious side. His use of imagery here allows the reader to see this. "Light" is luminescent, bright, white. It luminites the world exposing people's faults. It's both bright and white, which is known to represent purity.
