"The hero of Joseph Campbell’s Hero’s Journey can get the boon in two main ways: It’s given to him by divine forces. If that happens then they’ll be there to help him with his return. Divine/demonic forces don’t want to hand it over, so he has to take it by force. In order to make the return, he has to escape them."
It is better to look at the boon as an intangible capacity which is the result of the journey through the new world/state. The intangible is associated with a tangible. These are simultaneously given and held back by various archetypes.
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