This document summarizes excerpts from treatises written by Rev. Jonathan Edwards and Rev. Charles Chauncy regarding the Great Awakening revival movement of the 1740s. Edwards, a "New Light," praised the emotional preaching style of revivalists like George Whitefield and their ability to touch people's hearts. He argued preaching should appeal to both reason and emotion. Chauncy, an "Old Light," criticized itinerant preaching and saw revivalism as detrimental theater that undermined clergy authority and church order. The document provides context for differing views on an influential religious movement in colonial America.