What is the author's tone in The Matchmaker by Thornton Wilder?

There is a passionate tone to the text. Consider, for example, when Cornelius gives a soliloquy in act II, when he and Barnaby are supposed to be hiding. His speech explains how wonderful he feels, having fallen in love. These are ideas that Barnaby has shown himself unable to understand, and Cornelius certainly could not tell them to anyone else.