Beyond the corners of the mind, lies the power of the Earth, the source of salvation, and the coming of evil
PSI or psychokinetic energy
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.