A Treatise Concerning Religious Affections

It is Jonathan Edwards's test of true religion: how to tell a genuine work of God in the heart from its many counterfeits. Edwards argues that real faith is not cool assent but affection — the heart truly moved — and then spends the rest of the treatise refusing every easy way of proving whether those affections are gracious or false.

He wrote it in 1746, after the Great Awakening had swept New England and then curdled. Thousands had professed conversion; some clearly were not converted, and no one could reliably tell which. Edwards had publicly defended the revival, and now had to say what in it had been the work of God and what had been mere excitement — so the book is the sober, hard-won reflection of a pastor who had seen both.

Edwards lists twelve marks that many took as proof of grace but which, he argues, settle nothing either way — for example the intensity of one's feelings, fluency in talking about religion, the order in which experiences came, the presence of Scripture texts rushing to mind, or great confidence and assurance. None of these, he shows, distinguishes a true work of God from a counterfeit; they can accompany either.

The twelve distinguishing signs that follow are the heart of the book. The chief of them — the one Edwards weighs most heavily — is that gracious affections bear fruit in Christian practice: a changed, humble, holy life. True affections have their root in the beauty of God's own holiness, produce a lamblike and dovelike spirit, and issue in obedience, rather than remaining mere feeling.

Not shallow emotion or mere passing feeling, but the deep inclinations of the soul — the heart's strong bent toward or away from things. Edwards argues that true religion consists largely in holy affections, because a faith that never moves the heart is dead; but he is equally clear that not all strong feeling is holy, which is the whole problem the book sets out to solve.

Yes — though occasioned by the Awakening, its question is permanent: how does anyone know whether their religion is real? Every generation of serious Christians faces it, and Edwards's answer, that the surest evidence is a transformed life rather than intense experience, has made the book a standard treatment of assurance and self-examination ever since.

It is a demanding book — closely argued and long, written by one of the most rigorous minds in American history. But it rewards patience, and its structure is clear: what true religion is, what does not prove it, and what does. Many readers who find the whole treatise heavy still return to the twelve distinguishing signs, which can be read on their own.

With Edwards's opening argument that true religion lies much in the affections, then the two lists — the signs that prove nothing, and the signs that distinguish. Readers pressed for time often go straight to the final and longest sign, that gracious affections issue in Christian practice, which Edwards himself treats as the surest evidence of all.