Halliday's concept of 'A.S.P.' is related to the Hindu concept of Brahman, and to the Greek philosopher Anaximander's "apeiron", the 'limitless or boundless' source of the world. "The Absolute is an infinite sentient power, an eternal continuum of motion. Because it is sentient it feels its own motion. Its motion is the content of its sentiency. It is from this fact that is derived the principle that says that a being knows only the modifications of its own substance; or consciousness is aware only of its own modalities". Individual beings are rotatory motions, or modalities, within the A.S.P., and are not-different from It. And not only individual beings but all phenomena: "Ultimately we have to say that all things we know, all the ideas we think, and all the feeling states we experience, the totality of phenomena of all worlds, are merely modalities of the motion initiated and sustained by the Infinite Sentient Power we call God".