Leibnitz followed the same general plan in his philosophy as the physicists adopt when they advance a hypothesis to explain existing data. He has it that general conceptions of the Idea are to be found, from which the particular may be derived; here, on account of existing data, the general conception, for example the determination of force or matter furnished by reflection, must have its determinations disposed in such a way that it fits in with the data. Thus the philosophy of Leibnitz seems to be not so much a philosophic system as an hypothesis regarding the existence of the world, namely how it is to be determined in accordance with the metaphysical determinations and the data and assumptions of the ordinary conception, which are accepted as valid[246]—thoughts which are moreover propounded without the sequence pertaining to the Notion and mainly in narrative style, and which taken by themselves show no necessity in their connection. Leibnitz’s philosophy therefore appears like a string of arbitrary assertions, which follow one on another like a metaphysical romance; it is only when we see what he wished thereby to avoid that we learn to appreciate its value. He really makes use of external reasons mainly in order to establish relations: “Because the validity of such relations cannot be allowed, nothing remains but to establish the matter in this way.” If we are not acquainted with these reasons, this procedure strikes us as arbitrary. a. Leibnitz’s philosophy is an idealism of the intellectuality of the universe; and although from one point of view he stands opposed to Locke, as from another point of view he is in opposition to the Substance of Spinoza, he yet binds them both together again. For, to go into the matter more particularly, on the one hand he expresses in the many monads the absolute nature of things distinguished and of individuality; on the other hand, in contrast to this and apart from it, he expresses the ideality of Spinoza and the non-absolute nature of all difference, as the idealism of the popular conception. Leibnitz’s philosophy is a metaphysics, and in sharp contrast to the simple universal Substance of Spinoza, where all that is determined is merely transitory, it makes fundamental the absolute multiplicity of individual substances, which after the example of the ancients he named monads—an expression already used by the Pythagoreans. These monads he then proceeds to determine as follows.