But now the question arises, Is the predetermination of things consistent with the free will of man? And the answer is that it certainly is not, if the freedom of the will be regarded as indifferentia (arbitrariness), but this is an unwarranted conception of the freedom of man. The will of man is not something altogether indeterminate, something hanging in the air that can be swung arbitrarily in either direction. It is rather something rooted in our very nature, connected with our deepest instincts and emotions, and determined by our intellectual considerations and by our very character. And if we conceive of our human freedom as lubentia rationalis (reasonable self-determination), then we have no sufficient warrant for saying that it is inconsistent with divine foreknowledge. Says Dr. Orr: “A solution of this problem there is, though our minds fail to grasp it. In part it probably lies, not in denying freedom, but in a revised conception of freedom. For freedom, after all, is not arbitrariness. There is in all rational action a why for acting — a reason which decides action. The truly free man is not the uncertain, incalculable man, but the man who is reliable. In short, freedom has its laws — spiritual laws — and the omniscient Mind knows what these are. But an element of mystery, it must be acknowledged, still remains.”[ Side-Lights on Chr. Doct., p. 30.]
Berkhof, Louis. Systematic Theology (p. 56). . Kindle Edition.