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 disposition.
wisdom of accomplishing activity - arises when the basic
ability to perform acts according to particular circumstances
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.
the 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.