Sentence:  Certainly not in Orchestra hall where he has played countless recitals , and where Thursday night he celebrated his 20th season with the Chicago Symphony orchestra , playing the Brahms Concerto with his own slashing , demon-ridden cadenza melting into the high , pale , pure and lovely song with which a violinist unlocks the heart of the music , or forever <WSD>finds</WSD> it closed . 
Meaning of the word marked with <WSD> tags:  come to believe on the basis of emotion, intuitions, or indefinite grounds