All creation happens through the one becoming two, and all creations ends through the two becoming one.
The one is the two genders combined creative force, by splitting them they become weak, but the contrast between them creates a strong field of development.
This field exist not only between man and woman, also when we change sex between our incarnations, or the differences between physical and etheric body.
It’s also permeates all of nature.
Sexual reproduction increases the development speed enormously. It’s speed is described through the Fibonacci series, and phi the golden mean, the key of the universe.
Nearly everything in nature follows the Fibonacci series or spiral, plants or galaxas. It reflects the three creative powers, the three Logoi : Father, Mother and Son.
It was necessary for us to enter deeply into the physical, as creators we should understand the created fully, master it fully, for that the masculine was needed.
To come up again the female part is needed, to direct the powers of the masculine upward again, only together can humanity get up from materialism.