Revelation of John 21:15-17

Verse 15. And he that talked with me. The angel, Rev 21:9.

Had a golden reed to measure the city. Rev 11:1. The reed, or measuring rod, here, is of gold, because all about the city is of the most rich and costly materials. The rod is thus suited to the personage who uses it, and to the occasion. Compare a similar description in Eze 40:3-5, 43:16. The object of this measuring is to show that the city has proper architectural proportions.

And the gates thereof, etc. To measure every part of the city, and to ascertain its exact dimensions.

(p) "golden reed" Rev 21:1, Eze 40:3, Zech 2:1
Verse 16. And the city lieth four-square. It was an exact square. That is, there was nothing irregular about it; there were no crooked walls; there was no jutting out, and no indentation in the walls, as if the city had been built at different times without a plan, and had been accommodated to circumstances. Most cities have been determined in their outline by the character of the ground--by hills, streams, or ravines; or have grown up by accretions, where one part has been joined to another, so that there is no regularity, and so that the original plan, if there was any, has been lost sight of. The New Jerusalem, on the contrary, had been built according to a plan of the utmost regularity, which had not been modified by the circumstances, or varied as the city grew. The idea here may be that the church, as it will appear in its state of glory, will be in accordance with an eternal plan, and that the great original design will have been fully carried out.

And the length is as large as the breadth. The height also of the city was the same--so that it was an exact square.

And he measured the city with the reed, twelve thousand furlongs. As eight furlongs make a mile, the extent of the walls, therefore, must have been three hundred and seventy-five miles. Of course, this must preclude all idea of there being such a city literally in Palestine. This is clearly a figurative or symbolical representation; and the idea is, that the city was on the most magnificent scale, and with the largest proportions, and the description here is adopted merely to indicate this vastness, without any idea that it would be understood literally.

The length, and the breadth, and the height of it are equal. According to this representation, the height of the city, not of the walls, (compare Rev 21:17,) would be three hundred and seventy-five miles. Of course, this cannot be understood literally; and the very idea of a literal fulfilment of this shows the absurdity of that method of interpretation. The idea intended to be conveyed by this immense height would seem to be that it would contain countless numbers of inhabitants. It is true that such a structure has not existed, and that a city of such a height may seem to be out of all proportion; but we are to remember

(a) that this is a symbol; and

(b) that, considered as one mass or pile of buildings, it may not seem to be out of proportion. It is no uncommon thing that a house should be as high as it is long or broad. The idea of vastness and of capacity is the main idea designed to be represented. The image before the mind is, that the numbers of the redeemed will be immense.
Verse 17. And he measured the wall thereof. In respect to its height. Of course, its length corresponded with the extent of the city.

An hundred and forty and four cubits. This would be, reckoning the cubit at eighteen inches, two hundred and sixteen feet. This is less than the height of the walls of Babylon, which Herodotus says were three hundred and fifty feet high. See Introduction to Isa 13:1. As the walls of a city are designed to protect it from external foes, the height mentioned here gives all proper ideas of security; and we are to conceive of the city itself as towering immensely above the walls. Its glory, therefore, would not be obscured by the wall that was thrown around it for defence.

According to the measure of a man. The measure usually employed by men. This seems to be added in order to prevent any mistake as to the size of the city. It is an angel who makes the measurement, and without this explanation it might perhaps be supposed that he used some measure not in common use among men, so that, after all, it would be impossible to form any definite idea of the size of the city.

That is, of the angel. That is, "which is the measure employed by the angel." It was, indeed, an angel who measured the city, but the measure which he employed was that in common use among men.
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