What Max stated. Also, bishos,priests, religious men and women where given constant conferences and workshops, to "update" them on the Council. As well as the new Catechisms that replaced the traditional Catechisms used up to the Council. The novel ideas "percolated" down to the laity through their pastors and teachers. Finally, the N.O.M. With its Protestant ethos, inculcated the new thinking into the laity. Archbishop Lefebvre even gave a talk that was published on the topic of the similarities between the reforms in the Liturgy of Paul VI and those of Martin Luther and his cohorts, here: https://www.sspxasia.com/Documents/Archbishop-Lefebvre/Luthers-Mass.htm