As I stated in my answer to your previous question, there are broadly speaking two views in classical Christianity, but one may divide into several different perspectives. I'll outline five, along with their answers to your questions: Open Theism, Arminianism, Calvinism, Molinism, and one I'll call "semi-Calvinism" which includes Lutheranism and "4-point" Calvinism. Of course, there is some diversity within each of these categories, but broadly speaking I believe this covers the whole field of Christianity. I will focus on the issue of salvation in particular, since this is the most important question in Christianity. I am speaking as a Calvinist; if I misrepresent any of the other views, I welcome correction.
Summary
The answers of the various positions to the questions posed may be summarized in a table:
|
Open Theism |
Arminianism |
Semi-Calvinism |
Molinism |
Calvinism |
God exhaustively knows the future |
No |
Yes |
Yes |
Yes |
Yes |
Free will |
Libertarian |
Libertarian |
Mix of libertarian and compatibilist |
Limited libertarian |
Compatibilist |
Salvation is ultimately the result of God's choice |
No |
No |
Yes |
Yes |
Yes |
Damnation is ultimately the result of God's choice |
No |
No |
No |
Yes |
Yes |
There are broadly two separate issues here, so I'll discuss them in two sections:
1. Free will and determinism
Broadly speaking, one can define free will in either a *libertarian* or a *compatibilist* way. An entity with libertarian free will makes choices that are wholly uncaused. Though they may be influenced by outside sources, the future decisions made by an actor with libertarian free will are not completely determined by the facts existing up to the present time. An entity with compatibilist free will, on the other hand, makes decisions that are determined by pre-existing conditions. Since those conditions include the desires, beliefs, thought processes, and habits of the entity in question, decisions can properly be said to be made by it, but if an outside observer knows perfectly the entity's mind and present situation, its choice can be predicted accurately.
Since this is simply two different definitions, it isn't really valuable to discuss which is the "correct" meaning of free will. It isn't a Biblical term, there is no Biblical argument about which definition to use; we get to decide which definition to use, and as long as we are clear what we're talking about, either is OK. Christians who would deny any sort of free will, either libertarian or compatibilist, regarding salvation are extremely rare. I've never encountered any in the wild. However, they do exist. Universalists would say that everyone is saved regardless of any of their choices. Hyper-Calvinists would say that humans are divided into the elect and the reprobate (appropriating terminology from the Calvinists), and the elect are saved regardless of their choices and the reprobate are damned regardless of their choices.
Fringe groups aside, the issue in Christian circles is whether human free will is best understood in a libertarian way or a compatibilist way. This question does not split Christians into exactly two groups, since there is actually a spectrum not a binary of "libertarian" vs. "compatibilist". Open Theists and Arminians say "yes" to libertarian free will in all cases, while Calvinists say "no". Semi-Calvinists would say that God unilaterally chooses to save the ones who are saved, but those who are not saved are not saved by their own free (libertarian) choices. This means that the choice to put one's faith in Christ is one made in a compatibilist way, but it is determined by the work of the Holy Spirit and not by the person being saved. On the other hand, the decision to reject Jesus is made freely (in a libertarian sense) by those who reject him, and is not predetermined. (Yes, people holding this view do acknowledge the apparent inconsistency here. No, they do not attempt to resolve it.) Molinists say that we do have libertarian free will, but only in a limited sense. They agree with the Calvinists that all outcomes are according to God's will. They reconcile this with libertarian free will by claiming that God has middle knowledge or counterfactual knowledge. He knows what we would do in any hypothetical scenario, and therefore designed the universe such that our free choices accord with his predetermined plan in all cases.
Scriptural arguments for the various positions on Libertarian Free Will
Please note that there are a lot of Biblical arguments that I am not citing here. I am only mentioning those which I think are the most compelling.
Biblical basis for libertarian free will: Proponents will support their perspective by arguing from the innumerable passages in Scripture which give us commands and instructions, which implies some ability in us to obey or disobey. They point especially to Deut. 30:11-15, which clearly puts the ball in our court, so to speak. They also will point to 2nd Peter 3:9 and 1st Timothy 2:4 which indicate that God desires to save those who are not saved. Similarly, Romans 10:21 and Matt.23:37 indicate that God is trying to save those who aren't saved. The blame for rejecting the Gospel is clearly put on the person who rejects it, and not on God, in 2nd Thessalonians 2:10. In order to argue that libertarian free will is at work in salvation, Open Theists and Arminians will point to verses such as John 3:16, Rev. 22:17, and many others, which indicate that anyone who desires to may come and be saved.
Biblical basis for rejecting libertarian free will: Opponents of libertarian free will support their view by pointing to Romans 8-9 (yes, the whole two chapters), especially pertinent is the argument in 9:11-24:
Though [Jacob and Esau] were not yet born and had done nothing either good or bad—in order that God's purpose of election might continue, not because of works but because of him who calls—she was told, “The older will serve the younger.” As it is written, “Jacob I loved, but Esau I hated.”
What shall we say then? Is there injustice on God's part? By no means! For he says to Moses, “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.” So then it depends not on human will or exertion, but on God, who has mercy. For the Scripture says to Pharaoh, “For this very purpose I have raised you up, that I might show my power in you, and that my name might be proclaimed in all the earth.” So then he has mercy on whomever he wills, and he hardens whomever he wills.
You will say to me then, “Why does he still find fault? For who can resist his will?” But who are you, O man, to answer back to God? Will what is molded say to its molder, “Why have you made me like this?” Has the potter no right over the clay, to make out of the same lump one vessel for honorable use and another for dishonorable use? What if God, desiring to show his wrath and to make known his power, has endured with much patience vessels of wrath prepared for destruction, in order to make known the riches of his glory for vessels of mercy, which he has prepared beforehand for glory—even us whom he has called, not from the Jews only but also from the Gentiles?
Paul emphasizes God's will over and against the human will in these paragraphs; Calvinists note that Paul anticipates the most common objections to God's choice being unconditional, i.e. that it is unjust or that it makes it absurd to find fault with sinners. Also, note Proverbs 16:1, 16:9, and 21:1.
Concerning salvation in particular: There are innumerable verses in the NT which talk about the saved people as "elect" (which means "chosen"). One can also point to the "book of life" image in Rev. 13:8, 17:8, 20:12, and 20:15, which appears to be a ledger of everyone who is saved, yet dates back to the foundation of the world. See also the statements of Jesus in John 15:16 and 6:37-39, which seems to indicate that coming to Jesus is the result of the God's choice.
Theologians arguing that salvation is not due to a choice of libertarian free will also point to verses such as Genesis 6:5 and Romans 3:10-18 and Jeremiah 17:9 that indicate the human condition is desperately wicked. They conclude therefore that in order to be saved, it must be wholly the work of God. They also point to Ephesians 2:8-9, Galatians 2:16, Titus 3:5, and many other verses that indicate salvation is by grace and not by works. The argument goes like this: Choices made by force of our will are "works" and therefore have no power to save us. On the other hand, grace is a gift from God and not something we can obtain except by his will.
Concerning damnation in particular: There is an obvious logical argument that if salvation is due to God's gift and not any choice on our part, then damnation must be God's will too, since he could choose to give the gift of salvific grace to everyone. Semi-Calvinists reject this as too much rationalism. Biblical support for God's choice also being the determining factor in damnation comes from Romans 9 (cited above) as well as Proverbs 16:4, 1st Peter 2:8, 2nd Peter 2:3,17, and Jude 13.
Biblical basis for middle knowledge: There are a few places in Scripture where God makes counterfactual claims, e.g. Matt.11:21 and 1st Samuel 23:12, which does not make sense if God doesn't have actual knowledge of the hypotheticals posed. (Note: Molinists are not the only ones who believe in middle knowledge, but they are distinguished by taking middle knowledge as the solution to the tension between human responsibility and God's sovereignty.)
2. God's foreknowledge
Open Theism asserts that God does not have complete knowledge of the future; he is passing through time in the same way that we are. They reconcile this with God's omniscience by postulating that God knows everything that there is to know, but future events haven't happened yet, so there is nothing true about them for God to not know.
To support the notion of God not knowing the future, open theists cite Genesis 6:6, where God is said to "regret" that he created man, as well as the testing of Abraham in Genesis 22, in which God apparently did not know in advance what Abraham would do. They also point to various passages which seem to contain unfulfilled prophecies, which they argue indicate that God made a mistaken prediction. Opponents of Open Theism will argue that said prophecies either have been misinterpreted by the open theists, or that they are not fulfilled yet but may be in the future.
Key to the open theist position is a non-Biblical logical argument that in order for someone to be morally culpable for their actions, they must be able to choose how to act, and in order for their choice to be a real choice, it cannot be known in advance. I know of know Biblical support for this syllogism.
Contrasting with Open Theism's stance on God's foreknowledge is Classical Theology, which includes all four other camps. In Classical Theology, God is above and separate from time. He is immutable which means not only that he is unchangeable, but that he does not actually experience the passage of time. From God's perspective, all times are laid out before him equally. (One might envision this a little like if you were to look at a three-panel comic strip, you can see all three panels simultaneously. God sees the entire timeline of the universe simultaneously.) This means that God knows the future just as completely as he knows the present and the past. This includes human choices. Biblical support for this notion comes from the numerous fulfilled prophecies, including those predicting specific actions by specific people (e.g. 1 Kings 13:2, fulfilled in 2nd Kings 23:15-16; Luke 9:22; Luke 22:34). Support for God's immutability and unique perspective on time comes from Isaiah 45-46, Psalm 102:25-27, Malachi 3:6, James 1:17, and others. I'll point out especially John 8:58, where Jesus says "before Abraham was, I am." Note the verb tenses here. Also, note that 2nd Peter 3:8: "with the Lord one day is as a thousand years, and a thousand years as one day," seems to indicate God's perspective on time is radically different from ours. A huge period of time is short to him and a short period is huge to him.
Classical theists also support their position with a non-Biblical syllogism: If God could change, then he would necessarily get better or get worse, which would contradict his perfection in either case. He isn't perfect if he can improve, and he isn't perfect if he has ever gotten worse.
Classical theists holding to libertarian free will argue that there is no contradiction because God's foreknowledge is in no way causative, and his knowledge is unknown to you. For example, if you are deciding whether to wear a blue shirt or a red shirt, God's foreknowledge of your choice has no influence on which you will choose. If you choose the blue, then it means that he knew all along that you would choose the blue. If you choose the red, that means that he knew that all along instead. In this way, your choice actually causes God's knowledge, not the other way around. The fact that your future choice causes God's knowledge in the present may seem counterintuitive, but it isn't logically inconsistent, especially if we remember that God is actually outside of time.