“The truth is always an abyss. One must - as in a swimming pool - dare to dive from the quivering springboard of trivial everyday experience and sink into the depths, in order to later rise again - laughing and fighting for breath - to the now doubly illuminated surface of things.” 
Kafka, F. (1883 – 1924)


The coincidence of the menstrual cycle with that of the moon is a physical actuality structuring human life and a curiosity that has been observed with wonder. It is in fact likely that the fundamental notion of a life-structuring relationship between the heavenly world and that of man was derived from the realization, both in experience and in thought, of the force of the lunar cycle. The mystery, also, of the death and resurrection of the moon, as well as of its influence on dogs, wolves and foxes, jackals and coyotes, which try to sing to it: this immortal silver dish of wonder, cruising among the beautiful stars and racing through the clouds, turning waking life itself into a sort of dream, has been a force and a presence even more powerful in the shaping of mythology than the sun, by which its light and its world of stars, night sounds, erotic moods, and the magic of dream, are daily quenched. 

Campbell, J. (1904-1987), in Primitive Mythology