Definition: Pietism is a religious movement that emerged in Europe during the 16th century and emphasized the importance of faith, prayer, and devotion to God as the ultimate means of salvation. This movement was characterized by a strong emphasis on worshiping a single deity or god, often known as "the god of Pietism," rather than a complex system of beliefs or practices. The term "pietism" is derived from the Latin word "pietus," which means "a follower."