How do the gods and goddesses of olympus affect the outcome of jason's adventure?

If you know Percy Jackson, then you can read Percy Jackson, heroes of Olympus 

As in other stories, the gods involve themselves in human affairs to effect the outcome they perceive as positive. As with Bellerophon and Theseus, they support Jason, the hero, in his noble quest to defend his family and his position as king. The gods also answer Nephele's prayers, which underscores the recurring theme that the gods sometimes listen to humans.

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