People are afraid to pursue their most important dreams, because they feel that they don't deserve them, or that they'll be unable to achieve them. We, their hearts, become fearful just thinking of loved ones who go away forever, or of moments that could have been good but weren't, or of treasures that might have been found but were forever hidden in the sands. Because, when these things happen, we suffer terribly.

The Alchemist - 10th Anniversary Edition (ed. HarperSanFrancisco, 1998)