How ought a Christian to regard his emotions? The history of theology has answered that variously. In 1746, Jonathan Edwards published A Treatise on the Religious Affections, which is a biblical discussion of the matter, and a worthwhile read especially in today's discussions over religious experiences. This article offers a survey of the work. Edwards, in twelve points, makes clear that emotions are important in spiritual life, but not always good indicators of our spiritual state. The way to ensure our emotions are godly is to think about God and his gospel. True godly affection is that which is felt by the saved individual, and the Spirit makes this possible.