It has been said that in Brazil the Catholic Church, by the adoption of the Theology of Liberation, chose the poor, but the poor chose the ever growing churches and sects of Pentecostal derivation. This paradox haunts the sociology of religion, in Brazil and elsewhere. This paper suggests to its solution a hypothesis inspired by Weber's 'Religious Directions of the World and their Directions' (the 'Zwischenbetrachtung').The social, political and economic efficacy of a given religious movement is essentially linked to its theodicy. In other words, the passage of religion to politics, if understood as the exit from religion as allegedly motivated by religion itself, involves a contradiction as it implies the elimination of its basic religious motivation. The inner-worldly success of a religious tendency depends, therefore, on the persistence of a properly religious 'rejection of the world'. In fact the whole of the Theology of Liberation movement falls under a certain cognitive penumbra, a kind of theological and philosophical syncretism, which constitutes both its main strength and its main weakness. [ABSTRACT FROM AUTHOR]