The Holy Spirit is the Third Person of the Blessed Trinity. He processes from the Father and the Son as their Spirit, the Spirit of Love.   As with every teaching about God, our human understanding falls short. The Catechism explains, CCC. 239. We ought … to recall that God transcends the human distinction between the sexes. He is neither man nor woman: he is God. He also transcends human fatherhood and motherhood, although he is their origin and standard: no one is father as God is Father. God is Spirit, and spirit is neither male or female. The human categories of sex or gender are distinctions arising from our human nature’s material need to perpetuate itself through reproduction. Neither God’s divine nature, nor the angels’ spiritual nature, have this need. The use of Father, Son, or masculine pronouns for God are, therefore, based on Revelation—that is how God has revealed Himself. Thus, although God is spirit and neither male nor female, the masculine usages (Father, Son, He, His etc.) reveals something about the Divine Nature, and the Communion of Divine Persons, by analogy to our own human nature. In creatures male and female refers to the mode of generating that nature. Males do so outside themselves; females within, nurturing life once begun. Since some religions and ideologies confuse God with his creation, this usage of masculine terms teaches us that God is other than His creation. He neither creates from His own being, nor nurtures creation within it. The Names Father and Son follow from this, as well. This does not mean that psychological qualities generally associated with femininity and maternity are not used in Sacred Scripture. However, these generally express God’s temporal relationship with His people, whereas the use in Revelation of masculine names, and associated terms, teach about the eternal Divine Nature and the eternal relations among the Divine Persons.