Elisabeth met Descartes on one of his visits to
The Hague. Descartes visited The Hague to meet some of the leading intellectual figures in the Netherlands who might support his philosophy. The Hague was often a gathering place to meet other influential, powerful people. As Descartes talked of his ideas, Elisabeth intently listened and became very interested in Descartes' thoughts of the mind and body. After his visit, it was told to him that Elisabeth had been very interested in his work. Descartes was flattered and told others that he would like to get to know the princess better. Descartes made another visit to The Hague, and was intent on having a conversation with Elisabeth, although this conversation for some reason did not happen. Elisabeth, upon hearing of Descartes' failed attempt to converse with her, wrote to Descartes a letter. In this letter, dated May 16, 1643, Elisabeth writes, "tell me please how the
soul of a human being (it being only a thinking substance) can determine the bodily spirits and so bring about voluntary actions". Elisabeth is questioning Descartes' idea of dualism and how the soul and the body could interact. Elisabeth questioned how something immaterial (Descartes' idea of the mind) could move something material (the body). She proposes three ways something can be "moved": through self-propulsion, external propulsion, or movement determined by the properties of something pushing it. The first and second options require physical contact, while the third option requires extension. If the mind is not part of the physical world, then it cannot make physical contact with anything, meaning the mind cannot interact with the body. By Descartes' own view, physical interaction is only possible through extension, but as Descartes thinks the mind lacks this property, it makes interaction impossible, ruling out the third option as well. In another letter from Elisabeth to Descartes dated July 1, 1643, Elisabeth agrees with Descartes that our senses are evidence that the soul does move the body and the body moves the soul, but that this interaction does not teach us anything about how this happens. This specific correspondence between Elisabeth and Descartes is often ignored by many historians, as they see it as insignificant, but a few regard it as influential in that Descartes and Elisabeth seem to be talking of the "
passions of the soul", as Descartes referred to them. Some historians have remarked that Elisabeth could have been a philosopher in her own right if it had not been for a lack of a systematic presentation of her philosophical position. == Contributions to the feminist history of philosophy ==