Specifically because of the fact that the James-Lange theory can be considered as a living realization of Cartesian teaching, studying its truth and … - Benedictus de Spinoza

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Specifically because of the fact that the James-Lange theory can be considered as a living realization of Cartesian teaching, studying its truth and historical fate cannot but be placed at the beginning of the study of Spinozist teaching on the passions. [...] What occurred in the psychology of emotions in the last half century and what we have tried to consider in the preceding chapters is nothing other than the historical continuation of this struggle, the prototype of which we perceive in the oppositeness of the two teachings, the Cartesian and the Spinozist. And exactly as it is impossible without explaining this oppositeness to properly understand the Spinozist teaching without elucidating the fate of anti-Spinozist ideas in the psychology of affects, it is also impossible to determine correctly the historical significance of Spinozist thought for the present and future of all of psychology. Just as Spinoza did not think that he found the best philosophy, but knew that he recognized truth, so in the struggle of contemporary psychological theory, we are trying to find not the one that best meets our tastes, best satisfies us and for this reason seems to be the best, but the one that best meets its objective and thus must be recognized as truer because the goal of science, like the goal of philosophy, is truth.