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Originally Posted by Greg  Well, I'm sure you know the rest of that age old question. How would you answer it though? |
If you consider a rock that large, the definition of lift becomes meaningless. Objects move relative to other objects (motion is not absolute). Lifting is simply separating two objects of mass - the one so massive that due to inertia, it experiences no measurable acceleration relative to the other as they are forced apart. Consider progressively massive rocks on earth. At some point the rock either collapse into the earths crust, or it becomes a planet and the earth becomes the rock. This would apply to any other planet. If the rock is in space, there is no other rock to lift against. Objects so massive they can not be forced apart would not be identifiable as separate objects - it would be one object.
Also the question implies an internal contradiction of what God can do. Can an omnipotent being create something that an omnipotent being could not move, implies both an all-powerful being (capable of creating objects of unlimited mass), and a limited being (unable to move an object of some mass).
The question is a good exercise of the mind (like Zeno's paradox), but it has no theological implications. I consider it good fun, like any riddle or a puzzle. It really has no application to God's nature - it is merely mental slight of hand.