As you become more in tune with yourself, you slowly improve your core until you break the outer layer of the core, revealing a newer, stronger layer that would be one rank higher than the previous layer.
And when Azrael told the system to explain what the [Lithany of Ascension] was, he got a similar explanation.
But over the years, people who have ranked up their cores have made it easier for younger demigods to reach a higher rank using the Lithany. They wrote down instructions and techniques that each demigod could use in practice, and when they followed those instructions, they could reach the required percentage for progressing much faster.
