# The Big Engine explained — Short Fiction > Chapter companion for Short Fiction by Fritz Leiber. ## What happens The Professor expounds his theory that the universe is a vast, mindless machine and that people are merely automatons, each set to perform a specific function without genuine consciousness or connection. He describes how most humans are like wooden puppets, incapable of true response, and how a rare few who awaken either go mad, turn mean, or hide away. He illustrates his philosophy by likening the sounds of the city to a mechanical symphony. ## Themes in this chapter ### Technology and Control The Professor describes the universe as a great engine and people as machines, emphasizing a deterministic, technological worldview. ### Alienation and Otherness The theory that individuals are isolated atoms, unable to truly connect or respond to one another, highlights profound alienation. ### Conformity and Rebellion The Professor discusses those who 'wake up' and either rebel (often turning mean) or hide away, contrasting with the majority who conform to their mechanical roles. ## Character check-ins ### The Professor The central speaker of the chapter, a former stoker on a lake boat who developed a mechanistic philosophy of the universe. ## Key lines > We seem to be responding to each other, but actually we’re just a bunch of wooden-minded puppets. Human interaction is an illusion; we are all automatons acting out pre-set roles without genuine connection. _The Professor's core thesis that people are like puppets, not truly interacting._ > Listen to the great mechanical symphony, the big black combo. The sounds of the city form a vast, impersonal orchestral piece. _The Professor's poetic description of urban noise as a symphony of machines._ ## Links - HTML: https://www.betterreads.online/discover/short_fiction_19_se/chapters/the-big-engine - Book: https://www.betterreads.online/discover/short_fiction_19_se - All chapters: https://www.betterreads.online/discover/short_fiction_19_se/chapters