The foremost outstanding is perhaps "the unity of the world." Confronted by the perplexing menace of the variation of experience, the dichotomies and oppositions of thoughts and things, the fusion and diversifications of many things into one and one into many, mankind has, from the moment it became reflective, felt in the relation of the One and the Many the presence of a riddle that engendered and sustained uneasiness, a mystery that concealed a threat. The mind's own preference, given the physiological processes that condition its existence, constitution, and operation, could hardly come to rest in a more fundamental normation than Unity. A world which is _one_ is easier to live in and with; initial adjustment therein is final adjustment; in its substance there exists nothing sudden and in its character nothing uncontrollable. It guarantees whatever vital equilibrium the organism has achieved in it, ill or good. It secures life in attainment and possession, insuring it repose, simplicity, and spaciousness. A world which is many complicates existence: it demands watchful consideration of irreducible discrete individualities: it necessitates the integration and humanization in a common system of adjustment of entities which in the last analysis refuse all ordering and reject all subordination, consequently keeping the mind on an everlasting jump, compelling it to pay with eternal vigilance the price of being. The preference for unity, then, is almost inevitable, and the history of philosophy, from the Vedas to the Brahma Somaj and from Thales to Bergson, is significantly unanimous in its attempts to prove that the world is, somehow, through and through one. That the oneness requires _proof_ is _prima facie_ evidence that it is a value, a desiderate, not an existence. And how valuable it is may be seen merely in the fact that it derealizes the inner conflict of interests, the incompatibilities between nature and man, the uncertainties of knowledge, and the certainties of evil, and substitutes therefore the ultimate happy unison which "the identity of the different" compels.
Unity is the common desiderate of philosophic systems of all metaphysical types--neutral, materialistic, idealistic. But the dominant tradition has tended to think this unity in terms of _interest_, of _spirit_, of _mentality_. It has tended, in a word, to assimilate nature to human nature, to identify things with the _values_ of things, to envisage the world in the image of man. To it, the world is all spirit, ego, or idea; and if not such through and through, then entirely subservient, in its unhumanized parts, to the purposes and interests of ego, idea, or spirit. Why, is obvious. A world of which the One substance is such constitutes a totality of interest and purpose which faces no conflict and has no enemy. It is fulfilment even before it is need, and need, indeed, is only illusion. Even when its number is many, the world is a better world if the stuff of these many is the _same_ stuff as the spirit of man. For mind is more at home with mind than with things; the pathetic fallacy is the most inevitable and most general. Although the totality of spirit is conceived as good, that is, as actualizing all our desiderates and ideals, it would still be felt that, even if the totality were evil, and not God, but the Devil ruled the roost, the world so constituted must be better than one utterly non-spiritual. We can understand and be at home with malevolence: it offers at least the benefits of similarity, of companionship, of intimateness, of consubstantiality with _will_; its behavior may be foreseen and its intentions influenced; but no horror can be greater than that of utter aliency. How much of religion turns with a persistent tropism to the consideration of the devil and his works, and how much it has fought his elimination from the cosmic scheme! Yet never because it loved the devil. The deep-lying reason is the fact that the humanization of Evil into Devil mitigates Evil and improves the world. Philosophy has been least free from this corrective and spiritizing bias. Though it has cared less for the devil, it has predominantly repudiated aliency, has sought to prove spirit the cause and substance of the world, and in that degree, to transmute the aliency of nature into sameness with human nature.