“Some late midrashic compilations use the term “shekhinah” to designate an entity that is separate from God himself. Rav Saadia Gaon, the great leader of the Jews in Babylonia, made a clear theological statement to this effect in the first half of the tenth century. In his philosophical work, “Beliefs and Ideas,” written in Arabic around 930 CE … Saadia could not accept physical references to the infinite, perfect God, so he postulated that all such references relate not to God himself but to a created angel, supreme and brilliant but still a creature, which is called kavod (glory, honor) in the Bible and shekhinah by the rabbis. Since Saadia, therefore, the shekhinah is conceived in Jewish writings as a lower power, separate from God, which has its main function in the process of revelation to the prophets. It can assume physical characteristics, and it can be envisioned by human eyes … By the late twelfth century the shekhinah was conceived as a separate, emanated divine power that is revealed to the prophets and assumes other worldly functions. In all these sources there is no hint of this entity being feminine.”
–Joseph Dan, Kabbalah: A Very Short Introduction, 2006, pp. 47.