Summary: The subject of Free Will cannot be simply defined. However, it can be described as the ability of a person to determine within themselves choices they make and the course of action they take.
Nowhere in the Bible is there any specific mention of Free Will, the divine will of God, or human free will because it never discusses philosophical subjects of any kind. It is apparent in the Bible that God is regarded as acting freely, and that humans are recognized as free agents to do whatever they want. However, the Bible does mention human freedom:
"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? As indeed he says in Hosea, "Those who were not my people I will call 'my people,' and her who was not beloved I will call 'beloved.'" "And in the very place where it was said to them, 'You are not my people,' there they will be called 'sons of the living God.'" (Rom 9:18-26 ESV)
Throughout the Bible, it is revealed that God acts according to the counsel of His will. The freedom of His Divine will is plainly implied:
"For who has known the mind of the Lord, or who has been his counselor?” "Or who has given a gift to him that he might be repaid?" For from him and through him and to him are all things. To him be glory forever. Amen." (Rom 11:34-36 ESV)
The Creator of the Universe can only act freely as there is nothing constraining Him to act in any other way. He acts in accordance with His own holy and just nature, which is love (John 4:8,16; also 1 Cor 13:4-7).
The Bible is written with the understanding that humans are free agents and have the consciousness of being free from the very beginning, as seen with Adam and Eve in the Garden of Eden (Gen 2:15-17). Jesus spoke with this understanding that humans are not passive pawns in the grand scheme of things when He said the following:
"Come to me, all who labor and are heavy laden, and I will give you rest." (Matt 11:28 ESV)
"yet you refuse to come to me that you may have life." (John 5:40-41 ESV)
"No one can come to me unless the Father who sent me draws him. And I will raise him up on the last day." (John 6:44 ESV)
The Quantum Science of Determinism versus Free Will
From a purely scientific understanding, human beings are a big bunch of atoms governed by mechanical laws. However, they are not just any bunch of atoms. Fundamentally, they are an intricately structured bunch of atoms governed by the precise mechanical laws of the universe. The decisions humans make depend on those laws and how they were assembled.
The Quantum world is fundamentally deterministic, yet the outcome of a person's decision is not preordained but is open to imprecision. Human beings are causal forces in the world that affect everything by the choices they make, and not just because of some underlying, subconscious, or predetermined biophysical processes in the brain.
Free Will requires the intentional agency of action(s) and all alternative possibilities, among which human beings can choose by their mental state. Free Will is entirely compatible with determinism at the fundamental physical level.
Psychologists, cognitive scientists, and economists all give different theories of how human choice-making works. Yet, they all treat human beings as agents who are faced with choices between different options and alternative possibilities. Rational human beings try to systematically make choices that are in line with their beliefs, preferences, and goals.
Quantum Physics helps us to understand that human beings possess libertarian free will to choose something or do anything because they are more than mere physical beings. It is a phenomenon of the present rather than the past. God does not want anyone to die an eternal death because of what they have done.
"…God our Savior,"… "wants all men to be saved and to come to a knowledge of the truth." (1 Tim 2:4 NIV)
The Triune God wants everyone to accept Jesus as their personal Lord and Savior, repent of their rebellion and sin and submit their life to Him as a free act of love. He gave them the freedom to make that choice (Ez 18:23; John 3:16; 2 Peter 3:9). The Quantum world reveals that God has complete free knowledge of all logical truth in every situation, whether before the beginning, in the middle, or at the ending under all possible interpretation of any component.