A Treatise Concerning Religious Affections is a famous publication written in 1746 by Jonathan Edwards describing his philosophy about the process of Christian conversion in Northampton, Massachusetts, during the First Great Awakening, which emanated from Edwards' congregation starting in 1734.

Jonathan Edwards (October 5, 1703 - March 22, 1758) was an American revivalist preacher, philosopher, and Congregationalist Protestant theologian. Edwards is widely regarded as one of America's most important and original philosophical theologians. Edwards' theological work is broad in scope, but he was rooted in Reformed theology, the metaphysics of theological determinism, and the Puritan heritage. Recent studies have emphasized how thoroughly Edwards grounded his life's work on conceptions of beauty, harmony, and ethical fittingness, and how central The Enlightenment was to his mindset. Edwards played a critical role in shaping the First Great Awakening, and oversaw some of the first revivals in 1733-35 at his church in Northampton, Massachusetts. His theological work gave rise to a distinct school of theology known as the New England theology.

Edwards delivered the sermon "Sinners in the Hands of an Angry God", a classic of early American literature, during another revival in 1741, following George Whitefield's tour of the Thirteen Colonies. Edwards is well known for his many books, The End For Which God Created the World, The Life of David Brainerd, which inspired thousands of missionaries throughout the 19th century, and Religious Affections, which many Reformed Evangelicals still read today. Edwards died from a smallpox inoculation shortly after beginning the presidency at the College of New Jersey (Princeton). He was the grandfather of Aaron Burr, third Vice President of the United States. (wikipedia.org)