In other words, it's not a completely supercilious argument, sort of "God is brought into being the same way objects that we make use of are brought into being."
Three middle-age blowhards (a supercilious retired soldier, a dull canon and the puffed-up owner of a river bathhouse) vie for the affections of a comely magician's assistant, who seems open to dalliances despite a relationship with her milquetoast employer (wonderfully underplayed by Mr. Menzel).