There shall Zion be seen, the head city of our solemn feasts. There shall thine eyes see Jerusalem, that glorious habitation; the tabernacle that never shall remove, whose nails shall never be taken out; world without end, whose cords everyone shall never corrupt.

The craftsman encourages the metalsmith, the one who wields the hammer encourages the one who pounds on the anvil. He approves the quality of the welding, and nails it down so it won't fall over."

And I will fasten him as a nail in a sure place; and he shall be for a throne of glory to his father's house:

In that day, saith Jehovah of hosts, shall the nail that is fastened in a sure place be removed, and be cut down, and fall; and the burden that was upon it shall be cut off: for Jehovah hath spoken.