XXVII. The Inner Earth
Let me first of all remind you that present-day people have only managed to penetrate the outer shell of the earth to a very small depth. They have gone scarcely beyond a depth of 2,000 metres. Everything else, everything beyond this, is beyond their limits of penetration. And they would really be utterly surprised, perhaps even confused, if they did succeed in learning more about the deeper layers of this our earth. They would be confused because they would find things there that show only the faintest similarity to those we know on the earth's surface. They would not have words to describe most of them, for the states of matter inside the earth are indeed utterly different from anything we know up here. They would be utterly amazed to find that the metal which corresponds to our silver is liquid like mercury down there. And the same holds true for the other metals and the minerals.