Macbeth was excited and enthusiastic about them because he sees what he wants to see. The witches promised Macbeth that Dunsinane Castle would never fall he shows no doubt towards them.
He was easily tricked by the Weird Sisters into believing that he is invincible. This "false sense of security" was his downfall.
A snake coiled and ready to strike, because since it says the snake is about to strike it's creating tension for the reader because he/she wants to know whats going to happen next.
Ir meaning un or not.
Example: I'm irresistible.
<span>It might be said that President Woodrow Wilson's speech is directed to the member of the congress to persuade them to enter the war against Germany. He expresses a negative aspect of the German government in order to support his arguments against this country.</span>