Contraception was immoral yesterday, it is so today, and it will be so tomorrow and forever, because it presupposes—on the part of anyone who is clearly aware of what he is doing—a willingness to act in a way that might be conducive to a basic human good (the initiation of a new human life) together with an unwillingness to permit life to begin to be. This unwillingness is no mere wish nor permission. Rather, it is an effective willing prepared to implement itself in such a way as to bring about its objective in reality.
(Germain G. Grisez, "Reflections on the Contraception Controversy," The American Ecclesiastical Review 152 [May 1965]: 324-32, at 325)
