“Since it must be treated from conception as a person, the embryo must be defended in its integrity, cared for, and healed, as far as possible, like any other human being.”
– Catechism of the Catholic Church, paragraph 2274

“No objective, even though noble in itself, such as a foreseeable advantage to science, to other human beings or to society, can in any way justify experimentation on living human embryos or fetuses, whether viable or not, either inside or outside the mother’s womb. To use human embryos or fetuses as the object or instrument of experimentation constitutes a crime against their dignity as human beings having a right to the same respect that is due to the child already born and to every human person.”
– Donum Vitae, Congregation for the Doctrine of the Faith, 1987

“The deliberate decision to deprive an innocent human being of his life is always morally evil and can never be licit either as an end in itself or as a means to a good end. It is in fact a grave act of disobedience to the moral law, and indeed to God himself, the author and guarantor of that law; it contradicts the fundamental virtues of justice and charity.”
– Evangelium Vitae, On the Value and Inviolability of Human Life, 1995

“There are no lives that are not worth living; there is no suffering, no matter how grave, that can justify killing a life; there are no reasons, no matter how noble, that make plausible the creation of human beings, destined to be used and destroyed.”
– His Holiness Pope John Paul II, November 9, 2004