Humanae Vitae
“Though it is true that sometimes it is lawful to tolerate a lesser moral evil in order to avoid a greater evil or in order to promote a greater good," it is never lawful, even for the gravest reasons, to do evil that good may come of it (18)—in other words, to intend directly something which of its very nature contradicts the moral order, and which must therefore be judged unworthy of man, even though the intention is to protect or promote the welfare of an individual, of a family or of society in general.”
HUMANAE VITAE
DONUM VITAE
Vatican document - Instruction on Respect for Human Life in Its Origin and on the Dignity of Procreation.
DONUM VITAE
Catholic Ping - let me know if you want on/off this list
