God sovereignly decreed that man should be free to exercise moral choice, and man from the beginning has fulfilled that decree by making his choice between good and evil.
When he chooses to do evil, he does not thereby countervail the sovereign will of God but fulfills it, inasmuch as the eternal decree decided not which choice the man should make but that he should be free to make it….Man’s will is free because God is sovereign. A God less than sovereign…would be afraid to…bestow moral freedom upon His creatures.
God moves undisturbed and unhindered toward the fulfillment of those eternal purposes which He purposed in Christ Jesus before the world began…with infinite wisdom and perfect precision of action. No one can…turn Him aside from His plans. Since He is omniscient [and] sovereign…there can be…no accidents…no breakdown in authority; and as He is omnipotent, there can be no want of power to achieve His chosen ends….
Within the broad field of God’s sovereign, permissive will the deadly conflict of good and evil continues with increasing fury. God will yet have His way [but] as responsible beings, we must make our choice in the present moral situation.
A.W. Tozer, The Knowledge of the Holy