The purpose of this article is to demonstrate that due to the so-called “accusation of Christomonism” made especially by the Orthodox observers during the Vatican II sessions, the pneumatology of French theologian Yves Congar proceeded to develop in a way that would have never happened without such a reproach. We will go through the accusation itself, its theological consequences, and then we will study the direct and indirect responses of Congar. Was Congar even aware of the effects that this accusation had on his theology?