It's always the Player's choice.
When you ask your deity for counsel and guidance about your future actions >>>
<<< [bla bla your fear bla] Then listen to your heart and pick one:
Here we see the Priest asking/praying their deity for guidance. Then internally reflecting on their fear for this situation (with the Player plainly communicating it to the World). Finally the Priest is instructed to "listen to their heart" and pick one option among 3 available...
- describe what you believe is the best course of action, then gain 1 XP
- ask the World what they believe is the best course of action, and gain Advantage to enact this plan
- alone with your doubts, tell the World how your deity's silence makes you feel. If it's just punishment, why do you deserve it? If it's malice or indifference, why do you stand for it? Either way mark Growth (only once per session)
So the Player can choose to describe what they think the Priest's heart wants them to do.
Or for whatever reason the Player can choose to pass the ball to the World. Maybe they have no ideas. Maybe they genuinely yearn for guidance that comes from an external source. Maybe they want someone else to mess with the Priest's heart for the drama and the lulz.
Or maybe the Player goes for the "silence". Maybe it's more interesting for them. Or maybe they really want the extra Growth mark.
Seems pretty clear to me.
But one thing I could do to make it all clearer is maybe change the wording to direct more attention to the "heart" thing. Like so...
- describe what your heart tells you is the best course of action, then gain 1 XP
- ask the World what your heart tells you is the best course of action, and gain Advantage to enact this plan