603. The human mind is divided into three regions, the lowest is called the natural, the middle the spiritual, and the highest the celestial. By regeneration man is raised from the lowest region, which is the natural, into the higher, which is the spiritual, and through this into the celestial. That there are these three regions belonging to the mind will be shown in the following section. This is why the unregenerate man is called natural, and the regenerate man spiritual. This makes clear that the mind of the regenerate man is raised into the spiritual region, and there sees from the higher what takes place in the lower or natural mind. That there is a lower and a higher region in the human mind, everyone can see and recognize by a slight attention to his own thoughts; for what he thinks, he sees; and therefore he says that he has thought or thinks this and that, which would be impossible unless there were an interior thought that is called perception, which looks down into the lower which is called thought. When a judge has heard or read over a long series of arguments presented by an advocate, he collects them all into one view in the higher region of his mind, thus forming them into one general idea; and from that he then looks down into the lower region, which is that of natural thought, and there arranges the arguments in order, and accordance with the higher, presents his opinion and pronounces judgment. Who does not know that a man may form more thoughts and conclusions in a moment or two, than he can express by means of his lower thoughts in half an hour? All this has been presented to make known that the human mind is divided into lower and higher regions.