John Dewey also had a very strong influence on Park during his college year. After Park took Dewey's course on logic his sophomore year of college, he decided to again shift his major, this time to philosophy. Park stated that his interest in going to college has originally been purely practical, originally intending to pursue engineering, but this mindset shifted when he began taking courses which truly intrigued him. He was endlessly fascinated by the notion of exploring the realm of the dubious and unknown rather than focusing on the secure knowledge offered to him in his previous years of education. Upon becoming a student of philosophy Park became, "presently possessed with a devouring curiosity to know more about the world and all that men had thought and done". His future work in the field of sociology, which primary focused on human's behavior in different environments, proves that this exploratory mindset stuck with him for the rest of his life.