What are some examples of metaphors in The Alchemist?

"…every blessing ignored becomes a curse. I don't want anything else in life. But you are forcing me to look at wealth and at horizons that I have never known. Now that I have seen them, and now that I see how immense my possibilities are, I'm going to feel worse than I did before you arrived. Because I know the things I should be able to accomplish, and I don't want to do so."