See this online text:

  • “Humanae Vitae and the Perfection of Love”, by Prof. David S. Crawford, M.T.S., S.T.L., S.T.D., Communio, Vol. 25, No. 3 (Fall 1998): pp. 414-433. Available in pdf format through this page of Communio.

Posted on the anniversary of the issuance of the Encyclical “Humanae Vitae”. See also the texts listed on the page “Marriage and the Family“ and on the 25 July 2019 post “Online text: “Every Marital Act Ought to be Open to New Life: Toward a Clearer Understanding”, by Germain Grisez et al.” For other texts and ebooks, you may access the List of Free eBooks (Arranged by Title), the List of Free eBooks (Grouped by Subject), the List of Worth-It Catholic Books & eBooks, and the main page of the Catholic eBooks Project.

“For God, the Lord of life, has conferred on men the surpassing ministry of safeguarding life in a manner which is worthy of man…. Hence when there is question of harmonizing conjugal love with the responsible transmission of life, the moral aspects of any procedure does not depend solely on sincere intentions or on an evaluation of motives, but must be determined by objective standards. These, based on the nature of the human person and his acts, preserve the full sense of mutual self-giving and human procreation in the context of true love. Such a goal cannot be achieved unless the virtue of conjugal chastity is sincerely practiced. Relying on these principles, sons of the Church may not undertake methods of birth control which are found blameworthy by the teaching authority of the Church in its unfolding of the divine law.” (Second Vatican Council, Pastoral Constitution “Gaudium et Spes”, 51)