Consider all of the moral issues that have to do with birth, whether preventing it or negating it: abortion, sex outside of marriage, pornography, today’s much vaunted fantasy of sex with robots. Consider the political and ideological issues: fears of overpopulation, health care, feminism, child poverty, education problems, child-raising controversies, embryonic stem cell research, reproductive engineering, adoption, divorce, marriage, family values.
Williamson says that our confused attitudes about birth tie into our confused attitudes about the body. One can see in his examples the current gnostic revival, which denies the spiritual significance of the physical realm (as in being “spiritual but not religious”) and rejects the body (as in transgenderism and in the transhuman dream of downloading our minds into the internet so that we don’t need our bodies anymore).
Against the gnostic worldview, we have the Nativity–the conception, birth, and infancy of God Himself as a physical, embodied human being–and the Holy Family.