9538. 'Which are on its four feet' means in the natural sphere. This is clear from the meaning of 'four' as that which implies a joining together, dealt with in 1686, 8877; and from the meaning of 'feet' as the natural, dealt with in 2162, 3147, 3761, 3986, 4280, 4938-4952, 5327, 5328. The firmness resides in the natural sphere because everything spiritual reaches down to and rests on that which is called natural truth, and everything celestial down to and on that which is called natural good. So it is that the natural is their foundation and consequently firm support. Few as yet know of this; therefore something will in the Lord's Divine mercy be said from experience about it elsewhere.

4938. The ones who in the Grand Man correspond to the feet, soles, and heels are those who are natural, which is why in the Word natural things are meant by 'the feet', 2162, 3147, 3761, 3986, 4280. By 'the soles' lower natural things are meant, and by 'the heels' lowest natural, 259. In the Grand Man celestial things constitute the head, spiritual ones the body, and natural ones the feet; they exist in this consecutive order. In addition, celestial things, which are the highest, are ringed about by spiritual ones, which are in the middle; and spiritual things are ringed about by natural, which are lowest ones.