What role do force of nature such as the wind and sun plan in Santiago's journey?

The notion of a universal language spoken by all creation is an important one in The Alchemist. This language manifests itself in signs presented by nature. Coelho underscores his concept of an all-encompassing unity, tying language (commonly considered a peculiarly human faculty) to the rest of nature. The world is itself a text, full of meanings to be deciphered and taught.