There is a difference with distinction between "ordain" and "determine." The language itself is not used synonymously by most of the Calvinist Divines and by most Calvinist adherents.
Just as the Westminster Confession states, God "ordains" all things that come to pass. What this does not mean, however, is that God deterministically causes all things that come to pass. We see this in the language of the Westminster Confession itself where the clause "ordains all things..." is quickly qualified with certain exceptions. Specifically, we are told, God does not "author" sin.
So, then, what is the difference? To explain the difference, I will refer to an Old Testament passage in which God's ordination is clearly seen and, if we explain the passage differently "determinism" can be clearly demonstrated--and, in this case, would be shown not to be the case.
Before we begin, we must admit a bit of mystery. However, we can see ordination in a fairly non-mysterious way. Having said that, it is important to understand that this is a window into what God is up to in this particular case, and we must understand that we are not given that window in most cases--especially in modern cases.
Here is the passage:
15 When Joseph's brothers saw that their father was dead, they said, “It may be that Joseph will hate us and pay us back for all the evil that we did to him.” 16 So they sent a message to Joseph, saying, “Your father gave this command before he died: 17 ‘Say to Joseph, “Please forgive the transgression of your brothers and their sin, because they did evil to you.”’ And now, please forgive the transgression of the servants of the God of your father.” Joseph wept when they spoke to him. 18 His brothers also came and fell down before him and said, “Behold, we are your servants.” 19 But Joseph said to them, “Do not fear, for am I in the place of God? 20 As for you, you meant evil against me, but God meant it for good, to bring it about that many people should be kept alive, as they are today. 21 So do not fear; I will provide for you and your little ones.” Thus he comforted them and spoke kindly to them. (Genesis 50:15-21, ESV) (Emphasis mine)
Genesis 50:20 gives us a window into what "ordination" is (as opposed to determination).
Ordination:
The text says there are two intents at work here--the intent of the brothers and the intent of God.
We clearly see (and know from the earlier parts of the story) that Joseph's brothers did intend evil against him. We know that the brothers' evil was sinful against God (for Joseph was made in His image), against Joseph, and against Jacob.
The original plan was to kill Joseph, but Judah didn't see the profit in such a thing and convinced the group to sell him. In either of these plans, we can clearly see the sinful intent of the brothers and we can see that sinful intent lead to their sinful and "evil" actions against Joseph.
The text also clearly states that God is intending "good" through the "evil" actions of the brothers. We see the brothers acting of their own volition--freely--in their sin against Joseph, but we know from the text that their actions are not happening in a vacuum--God, in His sovereignty intends their free and sinful actions to serve His greater purposes.
This is what is referred to as God's "super-intention," and it is what we mean when we refer to God's "ordination." By ordination we mean that man can and does act freely of his own volition according to his nature and God can and does super-intend those free and often sinful actions to serve His purposes and display His glory.
We see something of this in the New Testament when Paul writes:
And we know that for those who love God all things work together for good, for those who are called according to his purpose.(Romans 8:28, ESV). Of course the proper understanding of the passage, as the ESV puts in a footnote (as it appears in some manuscripts) is: "God works all things together for good..."
Notice, in both the Genesis passage and the Romans passage that God is not "working evil things out for good" in some after-the-fact way. No, instead, God--quite before-the-fact--is causing even sinful things to work out for His plan, His glory, and our good. He is ordaining the ends and the mean to serve His grand purpose.
Determination:
Determination is a different story altogether. In the Genesis passage, Joseph
does not say: "God caused your evil for good." Had Joseph said that, we would indeed have determinism. However, we don't have that. We clearly see the brothers acting on their own--they are not mere puppets.
So, the sovereignty of God and the free will of man do fit together in a mysterious way--but they do fit together in a non-deterministic way.
There are two great errors (heresies, really) that must be avoided in any discussion about the sovereignty of God and the free will of man. The first error is Determinism. Determinism portrays God as nothing more than a puppet master and man as having no will of his own. As we have seen, the Bible does not portray God in this way, and neither should we.
On the other hand, the second error is Open Theism. Open Theism portrays God as having no knowledge of the future and man as being the chief determiner of the course of history. Open Theism portrays God as nothing more than the hand-wringing pleader who is incapable of any plans because He cannot and does not know the future. Perhaps the image of the Wizard from
The Wizard of Oz would be apropos here. The Bible does not portray God in this way either, and neither should we.
The Bible always portrays an absolutely sovereign God and a mankind that is absolutely responsible and exercising of his own free will. Man's actions never take God by surprise and man's actions never take place outside of the ordination of God. This is why we are able to say to those who have experienced great tragedy that God is in control. And, though we cannot know what He is up to in this particular situation, we can trust that God does cause all things to work together for good for those who trust Him and are called according to His purpose precisely because He for-ordains the free and sometimes sinful actions of man to serve His purposes and display His glory. So, God is absolutely trustworthy in all times and in all circumstances, because He is sovereign and because He "ordains all things...".
The Archangel