Stuck trying to get through
I'm stuck partway into the Sun Temple. And have been stuck for a considerable amount of time.
Spoiler
I've not made it to the boss yet. I've figured out how to raise the water and have found the first save point. (There is, apparently, another save point somewhere close by, but I'm at the lower one.)
There is, to the right and below this save point, a passage that goes down. However it is dark, and I can't figure out if this is the way to get through.
Hints or other help please. Forms I have got thus far: Energy Form, Spirit Form, Nature Form, Fish Form & Beast Form. I've also found Li, if that matters.