"The prototype for Hegel's reading of the principle of subject–object identity came not from the Kantian–Fichtean tradition but its very antithesis: Spinozism. For Schelling and Hegel around 1801, the principle of subject–object identity essentially functioned as a declaration of their monism. It served as a statement of protest against all forms of dualism, whether Kantian, Fichtean or Cartesian. Schelling and Hegel greatly admired Spinoza for his monism, for showing how to overcome dualism when Kant, Fichte and Jacobi had only reinstated it. True to Spinoza, their principle of subject–object identity essentially means that the subjective and the objective, the intellectual and the empirical, the ideal and the real – however one formulates the opposition – are not distinct substances but simply different aspects, properties or attributes of one and the same substance. The principle follows immediately from the Spinozist proposition that there is only one substance, of which everything else is either a mode or an attribute. If this is the case, then the subjective and objective cannot be two things but must be only modes or attributes of one and the same thing. Though he never used the term, Spinoza himself had developed something like a principle of subject–object identity."