Symbols - What does heaven look like
First a definition from Wikipedia
A spindle is a straight spike usually made from wood used for spinning, twisting fibers such as wool, flax, hemp, cotton into yarn. It is often weighted at either the bottom, middle, or top, commonly by a disc or spherical object called a whorl, but many spindles exist that are not weighted by a whorl, but by thickening their shape towards the bottom, such as Orenburg and French spindles. The spindle may also have a hook, groove, or notch at the top to guide the yarn. Spindles come in many different sizes and weights depending on the thickness of the yarn one desires to spin
In effect, the spindle symbolically is synonymous with the celestial pole. It is connected with spinning, with weaving, with looms and more importantly with the wheel. Where the spindle has a disc at the top, the symbolism of the collar or ruff comes into play.
And there is of course a direct connection with the symbolism of the thread or cord.