The witches predict that Macbeth will be king and how he will fall. These predictions cause Macbeth to dedicate his life to following the witches predictions, doing whatever it takes to make them come true, or to avoid them.
Macbeth takes the witches' predictions seriously because they have already proven to be accurate when they predicted his victory in battle. Their prophecies align with his ambitions, fueling his desires for power and greatness, making him believe their words will come true. Additionally, the supernatural elements surrounding the witches make their predictions seem more credible and otherworldly to him.
None of the predictions made to Banquo come true in the course of the play. The first prediction which comes true is that Macbeth will become king (He is already Thane of Cawdor when they meet the witches, so that is not a prediction.)
The witches' prediction that Macbeth will become the Thane of Cawdor has come true, as he receives this title in Act 1. However, their prediction that Macbeth will become King has not yet been fulfilled at this point in the play.
She immediately had the idea that her action was required in order to make them come true, and so she prayed for the ruthlessness needed to do so.
Macbeth heads home to prepare his household for a royal visit. But he first sends a letter ahead, to give his wife the news of the witches' predictions. He shows up not too long after Lady Macbeth finishes reading his message [Act 1 Scene 5].
According to the Shakespearean play, Banquo and his son Fleance were attacked by three murderers as they wended their way back to an evening banquet at Forres Palace. Fleance managed to escape. But Banquo never got out of the park near the palace. The murderers managed to cut his throat. The murder of the father, and not of the son, was in accordance with the witches' predictions in Act 1 Scene 3. The witches had told Banquo that he never would be king. But they indicated that Banquo would be the ancestor of a long line of kings. And so, in terms of the plot, it was important for Fleance to escape. The murder of the one and the escape of the other put Macbeth ever more in harm's way from the witches. It made him accept the witches' predictions as fact and as fate. And it made it possible for the predictions to come true.
The musical the Witches of Eastwick, opened in London in 2000.
How Macbeth feels about the witches' predictions changes throughout the play. Sometimes he thinks they can be thwarted, as when he tries to kill Banquo and Fleance. At other times he thinks they can be relied upon. He is not sure how he feels.
Grandma in "The Witches" by Roald Dahl is from Norway.
Knowledge, experience, and our ability to extrapolate past trends into the future help to make predictions about the future, but do not guarantee those predictions will come to pass.
The witches' prophecies all come true. Indeed Macbeth should beware Macduff because Macduff is the one who kills him, the one who is not of woman born. The forest of Birnam Wood (or part of it anyway) does travel to Dunsinane before the final battle.