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Mind–body problem

Galen believed there is no sharp distinction between the mental and the physical. This was a controversial argument at the time, and Galen agreed with some Greek philosophical schools in believing that the mind and body were not separate faculties. He believed that this could be scientifically shown. This was where his opposition to the Stoics became most prevalent. Galen proposed organs within the body to be responsible for specific functions. According to Galen, the Stoics' lack of scientific justification discredited their claims of the separateness of mind and body, which is why he spoke so strongly against them. There is an intense scholarly debate about soul–body relations in Galen's psychological writings. In his brief treatise Quod animi mores, Galen says both that the soul "follows" the mixtures of the body, and that the soul is a bodily mixture. Scholars have offered ways of reconciling these claims, arguing for a materialist reading of Galen's philosophy of mind. According to this materialist reading, Galen identifies the soul with the mixtures of the body.