This article is an analysis of sixteen texts written by Stefan Wyszyński, founder and first editor-in-chief of the weekly “Ład Boży”, which were published in the author’s series “Ład w myślach”. Wyszyński published in-depth and thoughtful studies on ecclesiastical marriage law in the weekly, under various pseudonyms. The reason for this was the promulgation of the Decree of 25 September 1945 Marriage Law, which implemented compulsory civil weddings for all Polish citizens and legally permitted divorce. Wyszyński, using the teaching of the Popes, in particular Pius XI, and the Polish Episcopate, warned the Christian faithful of the dangers of ideologies striking at the institution of marriage, defended it and showed the way forward.