To understand a holy unity, examine the flame rising from a candle. We see at first two kinds of light, one glistening white and one blue or black. The white light is above and rises in a straight line, the blue or black light is beneath and appears to be the source of the white; yet the two lights are so closely united they form one single flame. But the source formed by the blue or black light is, in turn, attached to the wick under it. The white light never changes, it always remains white; but several shades are distinguishable in the lower light. Moreover, the lower light moves in two opposite directions; above, it is connected to the white light, and below, it is attached to the burning matter; this matter continually consumes itself and rises toward the upper light. It is thus that all that is, reunites with the one unity.

– Zohar

(Original photo by Luc V.)