The alchemist says that for the boy to find his treasure he must listen to his heart. Why does the alchemist feel that the heart is more important, or more trustworthy, than the mind? How and why is the heart able to understand things the mind cannotgrasp

The heart givea us dreams. Dreams in the sense of "goals" or "aspirations" constitute a major themes in the story. Santiago's dream of the treasure provides him with a goal; Santiago resolves to find the treasure, and by his decision to pursue this goal he is able to realize his Personal Legend. Thus, Coelho plays with the dual (and of course linked) meanings of the word "dream", as both visions during slumber and far-reaching objectives. In this sense, the message of The Alchemist could be described as follows: everyone needs a dream.