Hello, Crazypreacher! Thank you for plaing SEIN!
Regarding the puzzle, the answer should contain five letters, and its related to the riddle given by the altar. (So hope or fear are disqualified) It might seem a little cloudy at fist, but once you find the answer, things get much more clear ;)
As for the content itself, it wont affect the progress of your game but will provide for a special skill in the future.
Have a good one!