3.l 20). When he says this, it is evident that Banquo is not suspicious of Macbeth enough to think that Macbeth would try to murder him. Unfortunately, Banquo destroys himself by placing his faith in Macbeth. In conclusion, trusting people based on outward appearances can put one's life in danger as there are many people who betray others.
Secondly, trusting powerful people can be dangerous as their power may not necessarily be in one's favour. Notably, Macbeth relies on the witches to ensure that he will later on be victorious, but he is tricked into thinking that he has nothing to worry about in the future, which allows him to let his guard down. The witches give him hints and say "the power of man, for none of woman born shall harm Macbeth" (4.1.l 79-80). Macbeth believes in what the witches say and is certain that Macduff was born from a woman, which is why he is deceived into believing that Macduff is not a threat to him. Unfortunately, Macduff is the one who ends up destroying him, and this fact proves that trusting powerful people can be dangerous no matter the circumstances. Macbeth trusts the words of the powerful witches, but they deceive him and he is defeated by Macduff. Also, Macbeth is told by the withes that "[he] shall never vanquish'd be until Great Birnam Wood to high Dunsinane Hill hall come to him" (4.1.l 91-93). Macbeth replies, "that will never be", showing that he is narrow-minded because he is unable to interpret the warnings in any other points of views but his own, which is what leads to his destruction (4.1.l 94). Furthermore, in the witches' prophecies, Macbeth is told that he "shalt be king" after becoming the Thane of Cawdor (1.3.l 48-49). He is tricked into believing that he will become king, which shows that it is dangerous for one to trust powerful beings because he ends up killing the king, thinking that he can get away with it.