Here's why:
* He discovers his powers: Percy's journey starts with him struggling to control his powers, feeling like an outcast and confused. He learns about his godly parentage and accepts that he has incredible abilities, which he uses to fight monsters and escape danger.
* He understands his place: While in the beginning, Percy wants to be normal, he realizes that he's destined for a greater purpose. He is not only a demigod, but the son of Poseidon, which comes with responsibilities and a unique role in the prophecy.
* He gains confidence: Percy begins as a scared, unsure boy, but throughout the story, he grows stronger and more confident in his abilities. He faces his fears and stands up for what he believes in, no longer afraid of his powers or the dangers he faces.
* He finds his family: The journey brings Percy into contact with other demigods, forming bonds with Annabeth, Grover, and Luke, who become his family and support system. This newfound family provides him with belonging and purpose.
Therefore, Percy's turning point doesn't happen at a single point in time, but rather unfolds through his experiences, discoveries, and the growth he undergoes. He learns to embrace his demigod status, taking on the challenges and responsibilities that come with it, and finding strength and purpose in the process.