"God is not a sexual being, either male or female─something that was considered to be true in ancient Near Eastern religion. He even speaks specifically against such a view in Num 23:19, where the text has Balaam saying God is not a man [ish], and in Deut 4:15–16, in which he warns against creating a graven image in "the likeness of male or female." But though he is not a male, the "formless" deity (Deut 4:15) has chosen to reveal himself largely in masculine ways." House, H. Wayne (reviewer). "God, Gender and Biblical Metaphor." J of Biblical Manhood and Womanhood, 10:1 (Spring 2005) p. 64
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"In no way is God in man's image. He is neither man nor woman. God is pure spirit in which there is no place for the difference between the sexes. But the respective 'perfections' of man and woman reflect something of the infinite perfection of God: those of a mother and those of a father and husband."
CCC 370.