He Himself created the pair, male and female. In human marriage, this change takes place at many levels, from a change in lifestyle, to changes in behaviour, to changes in the soul. There must be that willingness on the part of both individuals to allow this unifying transformation to take place. To accept the self the way it is, is to lock oneself into stagnation and narrowness and to remain an individual - not part of an intimately joined pair. If the two partners of a marriage set themselves in correct relation to God then certainly a perfect balance will be realized within their lives together.
Love is a movement towards unity, towards oneness.
For love is the shadow of Oneness, familiarity the shadow of love, and balance the shadow of familiarity.