What does lennox suggest about Macbeth in scene 6?

Lennox suggests in Scene 6 that there is a supernatural element at play in the events surrounding Macbeth's rise to power. He refers to the witches' prophecies and the strange occurrences that followed, such as the appearance of the ghost of Banquo, as evidence that Macbeth is cursed or ensnared by some mysterious force. This scene contributes to the overall atmosphere of unease and foreboding in the play.