Although much can be said of Macbeth in the first act, the most salient qualities are his abilities as a soldier, his loyalty to Duncan, his heroism, and most importantly, his ability to reason. Although the audience seems to view Macbeth as having a strong sense of self, due to his military heroism, Macbeth does possess a hint of insecurity upon his meeting with the Weird Sisters; the hint of insecurity lies in the perception of Macbeth as he is foiled by the actions, words of Banquo. Macbeth's letter to Lady Macbeth gives the audience an imaginative "GAP". The audience learns much about the relationship between Lady Macbeth and her husband, as she "fears" his instinctive mild nature. Macbeth's ambition is ultimately sparked and driven by Lady Macbeth's power over Macbeth's insecurities (manhood). Furthermore, at the conclusion of scene seven Macbeth's ability to reason is thwarted by Lady Macbeth. His soliloquy marks the turning point in which reason, morality, the good of the state, is forever interrupted by Lady Macbeth's entrance and interruption of Macbeth's ability to reason.