Sentence:  Descartes is a thinker whose very reputation and influence have been serious obstacles to the correct understanding and interpretation of his doctrines . . . . This is preëminently true of his ‘<WSD>philosophy of mind</WSD>', understanding by this expression his conception of the human mind, its nature and significance. 
Meaning of the word marked with <WSD> tags:  The views of a particular philosopher or philosophical movement concerning the matters studied within this area of philosophy.