God is Responsible for All Creation
In the divine laws of liability God lays down the principle that a man is responsible for that which he owns. For example, if a farmer digs a well and neglects to take basic safety precautions and cover the pit, and if a neighbor’s ox falls into that pit and is killed, the owner of the pit is liable and must pay damages to his neighbor (Ex. 21:33).
Again, if a man lights a fire and it gets out of hand and burns the neighbor’s field, the man who lit the fire is liable, because he created the fire and therefore is its owner (Ex. 22:6). These are basic liability laws that define the will of God in areas of justice and responsibility between men.
This principle, when applied to the big picture, shows us that God is responsible for all of His creation—even for the bad things that happen. God is ultimately liable for all the evil that has occurred in the world. One cannot blame the devil, because the devil created nothing and owns nothing. One cannot ultimately blame bad men either, because the bad men did not create themselves.
In the case of the ox falling into the uncovered pit, the one who dug it cannot say in his defense, “That stupid ox fell into the pit by his own free will.” Such an argument makes no difference in the divine court. The only relevant fact in the case is that the one who dug the pit is responsible for it.
In the case of Adam and Eve, whether these are actual people or just prototype human beings, the Bible story makes it clear that God created them. The “tree” of the knowledge of good and evil, however men may interpret the story, provided the temptation, and the “serpent” was the tempter. God created both the tree and the serpent.
That means God, in effect, “dug a pit” and left it uncovered. That is, Adam and Eve—like the stupid ox—were given willful opportunity to stay away from the uncovered pit or not. Of course, man “fell” into the pit and died (became mortal).
So who is legally liable in the divine court? Well, God is, of course. Adam and Eve did not dig the pit, nor did they create the serpent. They were just too stupid to stay away from the pit. They fell, and they died. God’s own law, then, demanded that the Owner of the pit pay fully for the death of the ox (Ex. 21:34).
In other words, God set up the law in such a way that He would make Himself liable for the fall of Adam and Eve. Did God know what He was doing? Of course He did. He knew from the beginning that the law would demand that He—the Creator and Owner of all—would have to pay the full penalty for sin.
That is why Jesus came to earth to pay the full penalty for sin. First of all, He loved His creation enough to do this (John 3:16). Secondly, He made it mandatory by law that He would have to do this. In that sense, the law was prophetic. It prophesied that God would have to be born as a man in order to be capable of dying for the sin of the world.
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I had to wonder if the Calvinist even bothered to read one verse in either direction around his prooftext there… 
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