Halliday's philosophy is non-dualist, as in the Hindu concept of advaita, expounded by Adi Shankara and other advaitin philosophers. Advaita is sometimes described as a monistic philosophy, but Halliday is careful to distinguish it both from monism and pluralism, as a description of the nature of the universe, and our relationship to 'God' or 'absolute sentient power' (see above) (A.S.P.). "Infinity is not comprehensible in a monistic concept, for monism implies circumscription, which is encapsulation or finitisation finite. Non-dualism and Non-pluralism refer to the Infinity of the Absolute Sentient Power (A.S.P.), the infinite modalising activities of which generate all noumena and phenomena. Monism is an attempt to grasp in a knowable concept that which is of itself unknowable, for to know is to finite form within the A.S.P."