“Let not light see my black and deep desires”

• he reveals his inner conflict and the darkness growing within him. 
• contrast between “light” and “black” symbolises the battle between good and evil.
• with “light” representing truth, morality, and divine judgment, while “black and deep desires”.
• reflect Macbeth’s hidden ambition and willingness to commit immoral acts to achieve power. 
• secrecy in his words suggests he is aware that his thoughts are wrong, yet he is tempted to pursue them anyway.
• marks an early turning point, as Macbeth begins to seriously consider betraying King Duncan. 
• showing how Macbeth is beginning to suppress his conscience in favour of personal gain.
• theme of appearance versus reality, as Macbeth wishes to conceal his true intentions beneath a loyal exterior. 
• foreshadows Macbeth’s descent into darkness and the moral destruction that follows when ambition outweighs integrity.
• Act 1, Scene 4