The presented article describes the various stages of editing the Can. 1057 about matrimonial consent. Coetus studiorum de Matrimonio, during the initial phase of codification work, focused on matrimonial consent as the efficient cause of marriage and on the object of this consent. The result of the consultants’ activities was the development of a draft of a revised canon on marital consensus. The next step was to organize the structure of the matrimonial law, as a result of which the norm on matrimonial consent was transferred from the de consensu matrimoniali chapter and placed among the introductory canons to matrimonial law. The next stage of work involved the consultation and printing of the Schemas of 1980 and 1982. The latter Schema, personally reviewed by Pope John Paul II, was approved and promulgated as the Code of 1983 that included Can. 1057, which was formulated in a personalistic spirit and which describes matrimonial consent in a positive aspect.