Edwards on Grace
Miscellany 522.
NO PROMISES TO UNCONVERTED MEN’S SEEKING SALVATION
It was not meet that God should make any promises of success to unregenerated seekers of salvation. For it is not meet that any should have absolute promises of success, unless they do what they can, or if they are slack and partial and ben’t through in seeking. Nor is it meet that absolute promises should be made to such as are thorough in seeking, unless they are persevering in it. It is not meet that God should promise men success, if they would be engaged in seeking during any limited time, as for a day or month or year. Therefore, it was not meet that God should make any absolute promises of success to any unconverted seekers; for no unconverted man will be thorough in striving for eternal life, and be fixed and persevering in it.
The Arminians say that God has promised that if men will make a good improvement of common grace, he will give special. Then I would ask, how long must a man make good improvement of common grace, in order to be entitled to that promise? Will it be a performance of the condition of the promise, if a man doth it for a day or a week? If it be said, that a man must go on in making a good improvement of it, waiting for the fulfilling of the promise in God’s time; I answer, that I believe that God has promised special grace to those that are faithful in the improvement of common grace, and continue so to be: but there are none but those that have special grace, that do thus. There is no promise of grace but what is implied in that, “To him that hath shall be given” (Lk 8.18). God make promises of grace only to grace.
Edwards establishes in the first paragraph that God is not obligated to promise anything to humankind. At the chagrin of the average Arminian or theologically inept person regarding the main facets of Reformed Theology, this fact might be offensive. However, it is requisite that a promise of grace or mercy on the part of God is just that, grace or mercy—but by God alone. You see, grace and mercy are never obligatory in any way shape or form because grace and mercy would (1) be nonsensical categories of thought, and (2) they would be self contradictory ideas that would leave nothing more than absurdity. What does this mean then? It means, as Edwards has pointed out, that God is not under any obligation to promise anything to the one who is not regenerated by the Holy Spirit. This fact, however, is always seen in light of God’s love for the world in his Son Jesus. But even then the Atonement by Jesus was not obligatory on the part of God, but God’s own free decision. God is the only one who is truly free. Speculators about this fact would do well to hold their tongues until the eschaton.
In the second section, Edwards points out the pelagian tendencies of Arminianism to make a necessary connection (falsely I believe) from common grace to special grace, or said another way, common grace to salvation grace. Arminians tend to argue that the common grace that God gives all people, whether regenerated or unregenerated to exist second by second and moment by moment physically and spiritually, can inevitably lead to a position of attaining special grace. An easier way to understand this is that Edwards is stating that Arminians believe that humans can effect their own salvation by common grace. Keep in mind that I said effect and not affect. This is the essence of the Arminian heresy presently in the church, but it’s not just Arminian, it’s human nature. We tend to think we’re always better than we are, but the truth is that we’re worse than we can realize. We also must bear in mind that God loves us more than we can imagine in our own sinfulness and depravity. This is a mystery.
In any case, Edwards’ point, I believe, is that by common grace we can affect our own salvation in the sense that God has provided common grace to do so. However, special grace which is salvific in nature does not occur by our own causation, but only the Spirit’s regeneration of our being by the special grace which is given by God. Edwards is pointing out in the second section that anything else would be absurd because one would have to wait an eternity for common grace to lead to special grace. Again, said another way, special salvific grace is always given and never achieved.
Why this matters:
This whole situation matters because Christianity is the story about how God reaches down and lifts us out of our own depravity by his mercy alone. As he lifts us out of a slough of despond we may grab onto him as a child would a parent, but the child cannot lift himself out alone. For some children, they grab on harder to God’s grace. For others, they let him do all the work.
On the other side of the coin is the exact opposite of Christianity, i.e., Religion. Religion typically has a story about how you and you alone are the arbiter of your own salvation. You need to be good, you need to be nice, you need to be loving, etc. etc. All of these concepts of religion are indeed good, but they do not save. Instead, the typical person who attempts to abide by them often sees them as a means of works righteousness. In religion, humanity saves humanity by some strange and corrupt form of rugged individualism. In Reformed Theology, and, I would argue, Christianity in general, the only saving possible is by and through the person of Jesus Christ.
We are saved by Grace alone through Faith alone, and consequently unto good works alone.
Basically, Arminians just have the whole dynamic of soteriology backwards.

Church Dogmatics I.1: The Doctrine of the Word of God, by Karl Barth
Jonathan Edwards: A Life, by George Marsden
America's Theologian: A Recommendation of Jonathan Edwards, by Robert Jenson
Beyond Liberalism and Fundamentalism: How Modern & Postmodern Philosophy Set the Theological Agenda
The Trinity, by Karl Rahner
The Orthodox Way, by Kallistos Ware
Jack: A Life of C. S. Lewis, by George Sayer
J.R.R. Tolkien: A Biography, by Humphrey Carpenter
Discipleship, by Dietrich Bonhoeffer