The spiritual is the mother of the material. The feminine is the mother of the masculine.
The soul is one. It can only be experienced in connection with the material. For without this there would be no experiencer, there would be only the One. So the soul alone cannot experience anything. The material alone experiences only loneliness.
Only with the spiritual, the feminine, the mother together with the material, the masculine, the son, can the meaning, the divine, the security in it be experienced.