When the disciple’s soul has become as lovely as a young princess adorned with pearls and precious stones, then the cosmic Spirit will come to it to fertilize it.
When this union takes place the disciple feels that, for the first time, something truly beautiful, something immense and grand has come into their life; they feel their whole being vibrating through and through with joy and hope. Little by little the child takes shape within them, and then the disciple’s energies are no longer wasted on foolish or futile activities but dedicated entirely to nourishing the child, exactly as the blood of a pregnant woman nourishes the child in her womb during gestation.
And if a male magus or white magician wishes to create children on the plane of thought he can do so also, for man is emissive on the mental plane: by his power of thought he fertilizes the universal Soul, thus peopling space with thousands of divine creatures. In any case, a true magus has no wish to have children on the physical plane; the only children he wants are spiritual children, spiritual entities, and for this reason he constantly unites himself with the cosmic Mother, the eternal feminine principle.
A woman, on the other hand, being receptive on the mental plane, can unite with the divine creative Principle and bear a child, the seed of which comes from God himself in the form of an ideal, a divine plan, for which the woman supplies the material elements it needs to become flesh and blood. But, I repeat, if a woman wants to create children herself, she can do so on the astral plane by fertilizing the universal Soul. A man fertilizes the universal Soul on the mental plane and a woman on the astral plane.
So now, let’s sum up: on the physical plane a man creates children, whereas a woman can only form them and bring them into the world. On the astral plane the situation is reversed: it is the woman who creates and the man who forms children and brings them into the world. And on the mental plane we have the same polarity as on the physical plane, the man creates and the woman forms. It is important to grasp the difference between creation and formation for without a proper understanding of these changes of polarity you cannot obtain any significant results in the spiritual world.
Omraam Mikhaël Aïvanhov
Izvor Book 209, Christmas and Easter in the Initiatic Tradition
Chapter 3, Birth on the Different Planes of Being