📖 Biblical Definition
Scripture teaches that man is more than a body -- he has an immaterial soul or spirit that survives physical death (2 Corinthians 5:8; Philippians 1:23). In this sense, there is a duality in human nature. However, Cartesian dualism goes further, treating the body as a mere machine that happens to house a mind. Scripture presents the body and soul as an integrated whole -- not two substances awkwardly joined but one person fearfully and wonderfully made (Psalm 139:14). The body is not a prison for the soul (as in Plato and Gnosticism) but a temple of the Holy Spirit (1 Corinthians 6:19). The resurrection of the body confirms that God's plan is not escape from the material world but its redemption and glorification.
📜 Webster 1828 Definition
A system which maintains two distinct substances, mind or spirit, and matter.
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DU'ALISM, n. A system which supposes two distinct substances or principles, as, for instance, mind and matter; or the system which maintains two distinct beings or persons in the Godhead. Note: Webster recognized dualism primarily in its philosophical sense -- the assertion of two distinct substances. The biblical view affirms a distinction between body and soul without the radical separation that Descartes introduced, and it affirms the ultimate reunion of body and soul in the resurrection.
📖 Key Scripture
• 1 Corinthians 6:19-20 — "Your body is a temple of the Holy Spirit... glorify God in your body."
• Genesis 2:7 — "The LORD God formed the man of dust from the ground and breathed into His nostrils the breath of life."
• 1 Corinthians 15:42-44 — "It is sown a natural body; it is raised a spiritual body."
• Matthew 10:28 — "Do not fear those who kill the body but cannot kill the soul."
⚠️ Modern Corruption
Cartesian dualism fuels both body-despising spiritualism and body-worshipping secularism.
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Cartesian dualism has split into two opposite errors in the modern church and culture. In the church, it shows up as a hyper-spiritualism that treats the body as irrelevant -- "All that matters is the soul." This leads to neglecting physical health, ignoring the goodness of creation, and dismissing the resurrection of the body as a peripheral doctrine. In the secular world, the radical mind-body split has been exploited by gender ideology, which claims that the "real self" (the mind) can be fundamentally different from the body -- that a person can be "born in the wrong body." This is Cartesian dualism taken to its logical extreme: the body is just a machine, and the mind is the true person. Scripture rejects both errors: the body matters because God made it, indwells it, and will raise it.
Usage
• "Cartesian dualism says the body is a machine housing a mind -- Scripture says the body is a temple of the Holy Spirit, fearfully and wonderfully made."
• "The claim that someone can be 'born in the wrong body' is Cartesian dualism at its extreme -- separating the self from the body God gave."
• "Christianity is not Platonism: the goal is not escape from the body but the resurrection and glorification of the body."