upper sets of spokes of a five spoked vajra symbolize the
five wisdoms, which are:
mirror like wisdom - that which reflects all sense
perceptions is purified when one attains enlightenment and
becomes the mirror like wisdom.
wisdom of equality - arises after all the feelings of
pleasantness, unpleasantness and indifference have been
wisdom of individual analysis - arises when the factor of
discrimination, which distinguishes one object from
another is purified. It enables one to benefit each
sentient being according to his or her needs and
wisdom of accomplishing activity - arises when the basic
ability to perform acts according to particular
circumstances is purified.
wisdom of the sphere of reality - arises when
consciousness is purified and becomes the mind that is the
seed of the wisdom truth body of a Buddha. The five lower
spokes symbolize the five mothers.
case of a nine spoked vajra, the upper spokes symbolize the
Buddhas of the five families and the four mothers, one
between each of the Buddhas. The lower spokes represent the
five wisdoms and the four immeasurable wishes of love,
compassion, equanimity and joy.
sea-monster's mouth from which each spoke emerges represents
freedom from cyclic existence. Of the two lotuses at the hub
of the vajra, the upper one symbolizes the eight
Bodhisattvas, and the lower one, the eight goddesses. Paired
with a bell the vajra represents method or compassion.