That name indicates the difference between matter and a mother. To
those who, refusing to be satisfied with superficialities, insist on
thoroughness, they thus signified in as precise a manner as possible
(without lifting the veil of) obscurity, that matter was sterile,
although feminine also to extent at least that matter receives, without
contributing to, the act of generation. They indicated it by this, that
the (Galli) who surround Cybele are not women, but neither are they
men, possessing no power of generation; for by castration they have
lost a faculty that is characteristic only of a man whose virility is
intact.