The form of the letter tzadik or tzadi , resembles that of the alef more than any other letter.
Man is the tree of the field.
The redeemed sparks serve to elevate the consciousness of the soul of the tzadik to ever higher levels of Divine perception. A yud enwedged in the upper right side of a bent-over nun . The yud faces either upwards or downwards, according to two varied traditions. The lifeforce returning - downwards. Form and matter.