... human free will implies God's prior decision not to tamper with the metaphysical base of that free will. It also implies man's ability to reject the persuasion God uses to influence that free will while leaving its metaphysical base intact! Persuasion, not compulsion, is what even He must rely upon! And persuasion, by its very definition, must be resistible!
Don Richardson (1984). “Eternity in Their Hearts”, Baker Publishing Group