Despite the devotion expressed towards Her in the Bible, the Feminine aspect of God has been neglected in the Christian churches (particularly the Protestant churches), some would say, to their detriment. This is no doubt due to the bias of an all male priesthood.
She is personified as Wisdom in The Book of Proverbs, in the Old Testament, and invoked in The Book of Wisdom, which is considered canonical, and part of the Old Testament, by the Catholic and Orthodox churches, though not by all Protestants.
She is described as having existed before the Creation (perhaps always) and as the agent through which it was achieved. She is considered to be the Breath of God, and the manifestation of His power. Like the Holy Spirit (who some believe is the same being, and therefore a feminine, motherly aspect of the Holy Trinity) She is present in those who have the pure desire for God.
For She is the breath of the power of God,
and a pure influence flowing from the glory of the Almighty:
therefore no defiled thing can fall into Her.
For She is the brightness of the everlasting light,
the unspotted mirror of the power of God,
and the image of His goodness.
And being but one, She can do all things:
and remaining in Herself, She makes all things new:
and in all ages entering into holy souls,
She makes them friends of God, and prophets.
-The Book of Wisdom 7:25-27
Luca Giordano, Allegory of Divine Wisdom, National Gallery, London (detail)