[839] Prop. xi., coroll.
82. The object of the human mind is body actually existing.[840] He proceeds to explain the connection of the human body with the mind, and the association of ideas. But in all this advancing always synthetically and by demonstration, he becomes frequently obscure if not sophistical. The idea of the human mind is in God, and is united to the mind itself in the same manner as the latter is to the body.[841] The obscurity and subtlety of this proposition are not relieved by the demonstration; but in some of these passages we may observe a singular approximation to the theory of Malebranche. Both, though with very different tenets on the highest subjects, had been trained in the same school; and if Spinosa had brought himself to acknowledge the personal distinctness of the Supreme Being from his intelligent creation, he might have passed for one of those mystical theosophists, who were not averse to an objective pantheism.
[840] Prop. xiii.
[841] Mentis humanæ datur etiam in Deo idea, sive cognitio, quæ in Deo eodem modo sequitur, et ad Deum odem modo refertur, ac idea sive cognitio corporis humani. Prop. xx. Hæc mentis idea eodem modo unita est menti, ac ipsa mens unita est corpori.
83. The mind does not know itself, except so far as it receives ideas of the affections of the body.[842] But these ideas of sensation do not give an adequate knowledge of an external body, nor of the human body itself.[843] The mind therefore has but an inadequate and confused knowledge of anything, so long as it judges only by fortuitous perceptions; but may attain one clear and distinct by internal reflection and comparison.[844] No positive idea can be called false; for there can be no such idea without God, and all ideas in God are true, that is, correspond with their object.[845] Falsity therefore consists in that privation of truth, which arises from inadequate ideas. An adequate idea he has defined to be one which contains no incompatibility, without regard to the reality of its supposed correlative object.
[842] Prop. xxiii.
[843] Prop. xxv.
[844] Schol., Prop. xxix.
[845] Prop. xxxii., xxxiii., xxxv.
84. All bodies agree in some things, or have something in common: of these all men have adequate ideas;[846] and this is the origin of what are called common notions, which all men possess; as extension, duration, number. But to explain the nature of universals, Spinosa observes, that the human body can only form at the same time a certain number of distinct images; if this number be exceeded, they become confused; and as the mind perceives distinctly just so many images as can be formed in the body, when these are confused, the mind will also perceive them confusedly, and will comprehend them under one attribute, as Man, Horse, Dog; the mind perceiving a number of such images, but not their differences of stature, colours and the like. And these notions will not be alike in all minds, varying according to the frequency with which the parts of the complex image have occurred. Thus those who have contemplated most frequently the erect figure of man will think of him as a perpendicular animal, others as two-legged, others as unfeathered, others as rational. Hence, so many disputes among philosophers who have tried to explain natural things by mere images.[847]