Why does Macbeth have second thoughts after killing the king when his wife not?

Macbeth has second thoughts after killing King Duncan because he is tormented by guilt and fear. He is afraid of being caught and punished for his crime, and he is also worried about the consequences of his actions. He imagines that he sees the ghost of Banquo, the man he had previously murdered, and he becomes paranoid and delusional.

Lady Macbeth, on the other hand, does not seem to experience the same level of guilt or fear after the murder. She is more focused on the practical aspects of the crime, such as cleaning up the evidence and preventing anyone from discovering what they have done. She is also more ruthless and ambitious than Macbeth, and she is willing to do whatever it takes to achieve her goals.

Overall, Macbeth and Lady Macbeth react very differently to the murder of King Duncan. Macbeth is plagued by guilt and fear, while Lady Macbeth is more focused on the practical aspects of the crime and the potential benefits that it could bring her.