Inside the Scroll

This is it. I pray it holds the answers I seek.

<Double-click on the 旧卷轴 in your Use Inventory.>

Maybe I should wait. My resolve may not yet be strong enough to face my inner darkness.

I've never seen this before. Perhaps it was used when selecting Aurora members.

According to this, I can reach the sanctum of Harmony even if I don't fully recover my powers of Light. But how?