The liquid in the bottle <u>smells</u> like some kind of acid.
It means that it is impossible to get something for nothing, or the idea that even if something seems free, there is always a cost, no matter how indirect or hidden the cost is.
MacBeth attempts to resolve his conflict by doing the act again. He is consumed by guilt and anger from killing the king that he ends up killing another. This only makes him worse and throws him into the path of evil and tyranny.<span />
Space out your time, and read it in intervals. Read diligently and don’t get off-track.