Brazilian Protestantism, in general, prides itself on being countercultural. It prides itself on being in a cultural captivity unable to dialogue with other areas of knowledge and especially with modern science. This work intends to show the roots and the development of a striking anti-intellectual discourse in Brazilian Protestantism that prevents it from being relevant in face of the demands of the present time. When looking at the ancient modernity, one can identify the plunge that humanity made towards rationalism, to exaggerated scientism, which, guided by the positivist bias, made man see himself totally separated from everything and everyone. In the religious milieu, the fight between Faith and reason is evident. However, one of the clear contours of the current paradigm is that the fight between religion and science, between Faith and Reason, deserves to die. Unfortunately, within Brazilian Protestantism, one can still hear strong echoes of this conflict that modernity has caused to explode. And within Protestantism, instead of denouncing the misuse of Reason, it was completely excluded. In Brazil, a Protestantism guided by pure emotionalism and a spirituality that does not see the world and its changes, persists in making a home within the various Protestant churches. A look at the past trying to understand the origins and development of this problem is essential to overcome it. This is exactly where this research is intended to help.