Sentence:  In any inquiry into the way in which great literature affects the emotions , particularly with respect to the sense of harmony , or relief of <WSD>tension</WSD> , or sense of `` a transformed inner nature '' which may occur , a most careful exploration of the particular feature of the experience which produces the effect would be required . 
Meaning of the word marked with <WSD> tags:  (psychology) a state of mental or emotional strain or suspense