In Shakespeare's play "Macbeth," the character Macbeth experiences profound internal turmoil and horror as he grapples with the consequences of his ambition and the violent actions he has taken to fulfill it. The quote "I have supped full with horrors" reflects his deep sense of guilt and the overwhelming nature of his experiences, suggesting he has been consumed by the terrifying events he has witnessed and participated in. This line encapsulates the theme of psychological torment that runs throughout the play.

Macbeth's descent into madness is marked by his grappling with the repercussions of his deeds, haunted by guilt and paranoia. The imagery of having "supped full" implies a completeness to his suffering; he is not only aware of the horrors he has unleashed but is also exhausted by them. This moment highlights the play's exploration of ambition, morality, and the destructive power of unchecked desires, ultimately leading to Macbeth's tragic downfall.