"The matter that is called Sefirot is like ten changeable vessels different in kind from each other, however the emanation and the light that passes through them from the Ein Sof is one, and from its perspective there is no plurality.....It is like ten glass vessels different in colouring. A well of fresh, clear, and pure water passing through them makes the ten different-coloured vessels appear to change so that they look like ten wells. This is the case because the water passing through each vessel will appear different from the outside according to the colouring of the vessel. In actuality, the water passing through all of them is one."
- Abraham Yagel (Gei Chizzayon)