Question: "What does the Bible say about predestination vs. free will?"
Answer: In discussing predestination vs. free will, many people so strongly prefer one side that they virtually reject the possibility of the other’s having even a hint of truth. Those who strongly emphasize the sovereignty of God in predestining who will be saved sometimes take a position that resembles fatalism. Those who emphasize the free will of humanity come close to denying the sovereignty of God. However, if the terms are understood biblically, the discussion should not be predestination vs. free will, but rather predestination and not-entirely-free will.
Passages such as Romans 8:29–30 and Ephesians 1:5–11 explicitly teach that God predestines some to salvation. The word translated “predestine” means “determine the destiny before.” There is no escaping the fact that God predetermines who will be saved. On what basis God predestines who will be saved can be debated, but predestination itself is absolutely a biblical teaching. Numerous other New Testament passages also refer to believers’ being chosen or elected to salvation (Matthew 24:22, 31; Mark 13:20, 27; Romans 8:33; 9:11; 11:5–7, 28; Ephesians 1:11; Colossians 3:12; 1 Thessalonians 1:4; 1 Timothy 5:21; 2 Timothy 2:10; Titus 1:1; 1 Peter 1:1–2; 2:9; 2 Peter 1:10).
A totally “free” will would be the capacity to make choices without any external constraints or coercion. There is nothing in the Bible that teaches human beings have this type of free will—only God is perfectly free from all constraint. One difficulty in the discussion of predestination vs. free will is the common understanding of free will being the absolute freedom to do anything we choose. This is not how the Bible presents free will, nor does it match reality. Our freedom is always limited by our circumstances and our nature: e.g., we are limited in our “freedom” to fly because we are not, by nature, birds; and we are subject to physical laws such as gravity and aerodynamics. The Bible teaches that without Christ we are “dead in our trespasses and sins” (Ephesians 2:1). If we are spiritually dead, surely that impacts our decision-making. John 6:44 says that, unless God draws, no one can come to Christ for salvation. If the decision whether to trust in Christ is impossible without God’s “interference,” our will is not totally “free.”
We have a free will in the sense that we are capable of making moral choices. Our decision-making is impacted by numerous factors, though: e.g., our sin nature, our upbringing, our intellect, our training/education, our biology, our psychology, etc. So, no, human beings do not truly have a free will, as popularly defined. We have a will. We can make decisions. Biblically speaking, we have the responsibility to respond to what God has revealed to us, including His call to believe the gospel (John 1:12; 3:16; Acts 16:31; Romans 10:9–10; Revelation 22:17). But, again, our will is not truly “free” because we have constraints that shape our decisions.
Predestination is an explicitly biblical doctrine. Free will is not directly taught in Scripture. If the question is predestination vs. free will, predestination wins decisively, biblically speaking. If the question is predestination vs. will or predestination vs. responsibility, that is more difficult. God is sovereign over everything, including who is saved. Concurrently, we are genuinely responsible for our decisions related to salvation. In the Bible, God repeatedly calls on us to exercise our will and trust in Christ for salvation, and we should pursue obedience to those commands regardless of how well we do or don’t understand predestination.