Question:
Beyond the corners of the mind, lies the power of the Earth, the source of salvation, and the coming of evil
Answer:
PSI or psychokinetic energy
Explanation:
Beyond the corners of the mind, - PSI is beyond the internment of our mind. It is generated there, and is unleashed beyond it.
lies the power of the Earth, - All your sanctuary locations around the earth magnify your power. In a sense, the power of the earth is energizing you.
the source of salvation, - In the end, it was Paula's psychic prayers that defeated Giygas, and restored peace to the world.
and the coming of evil - Giygas influenced the minds of other people, animals, and monsters. It was the beginning. The beginning of a war, bound for Earth.