Although the Judeo-Christian God is typically described in masculine terms—such as father, king, warrior—many theologians argue that this is not meant to indicate the gender of God. According to the Catechism of the Catholic Church, God "is neither man nor woman: he is God." Several recent writers, such as Sallie McFague, have explored the idea of "God as mother", examining the feminine qualities attributed to God. For example, in the Book of Isaiah, God is compared to a mother comforting her child, while in the Book of Deuteronomy, God is said to have given birth to Israel.