How did santiago learn to turn himself into the wind in the book the alchemist?

In "The Alchemist," Santiago learns to turn himself into the wind through a profound understanding of the soul of the world and his connection with nature. He realizes that he must fully embrace his own Personal Legend and tap into the universal language that connects all living things. By meditating and focusing on his surroundings, he gains the insight that true mastery comes from understanding and harmonizing with the elements, ultimately demonstrating his ability to transform and manipulate them through sheer will and belief. This culminates in his dramatic moment of turning himself into the wind during a test imposed by the tribal chieftains.