The following article summarises some of the aspects of joy as a spiritual state (Descartes), and as an affect/stimulation of the modi of nature (Spinoza). The psycho-physiological (Descartes) and ontological (Spinoza) placement of joy creates basic differences in evaluation of the said state by the two philosophers. As a result, the moral instructions provided by them to the reader vary in an approach to the emotions and their effect on human actions. Descartes values the importance of sadness as an affect warning us from dangers; Spinoza claims that joy (as different from pleasure) can never be excessive and encourages pursuing it as a mean to achieve happiness.
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