By mistake i clicked on the english challenge question. how to unable it? ?

In the song mallam sile sings in lines 113 through 130 the knife probably represents

He had fished in the river since ten years and he was a good fisherman. he know where to found the slim sliver chilwa fish, a big beautiful mahseer and the long moustache singhara. he know where the river was deep but where it is shallow; he knew which baits to use - which fish like worms and which liked gram. edit the above

Why is macbeth both excited and fearful after hearing the witches prediction about his future