Sentence:  Everyone is ambivalent about his profession , if he has practised it long enough , but there were still moments when he loved the <WSD>stage</WSD> and all those unseen people out there , who might cheer you or boo you , but that was largely , though not entirely , up to you . 
Meaning of the word marked with <WSD> tags:  the theater as a profession (usually `the stage')