And now we will look again at a verse in the Book of Job, which tells us something very wonderful about the inside of this great globe of ours, upon the fair outside of which we live and move. You would never have thought it possible that such a great ball could be weighed. But by weighing and measuring--not with scales and weights, you may be sure, but by clever ways which are known to learned philosophers--it has been found out that our earth is very, very heavy. The philosophers thought it could not be so heavy if it were made of earth and rocks all through, and they wondered what could be far down beneath the deepest mines, in those secret places which they could not reach. But long before these wise men had begun to weigh and measure, and to guess and wonder, God had said, "As for the earth, out of it cometh bread"--you know that in many places the surface of the earth is rich with waving corn--"and under it is turned up as it were fire." I remember well when I first heard about this fire always burning at the heart of the earth. I had been told that the world was round like a ball, and yet that people lived upon every part of it. And when I turned the globe in the schoolroom round until I had found New Zealand--that land which is just opposite our own country, as you can see for yourself if you look--I used to think how wonderful it was that the New Zealanders should be there "walking about under my feet," as I had been told they were; and a great desire came into my mind to make a way right through to them, and see what they were like. I believe I thought they were men who walked on their heads, for in those days I much preferred guessing at things I did not understand, to asking someone who knew how to explain them to me. So you see I understood so very little, that I actually thought that by getting up early and working hard it would be quite easy for me, with my little spade, to dig right down to the other side of this mighty globe!