Faced with the urgency of certain problems, some are tempted to emphasize, unilaterally, the liberation from servitude of an earthly and temporal kind. They do so in such a way that they seem to put liberation from sin in second place, and so fail to give it the primary importance it is due. Thus, their very presentation of the problems is confused and ambiguous. Others, in an effort to learn more precisely what are the causes of the slavery which they want to end, make use of different concepts without sufficient critical caution. It is difficult, and perhaps impossible, to purify these borrowed concepts of an ideological inspiration which is compatible with Christian faith and the ethical requirements which flow from it.
But the "theologies of liberation", which reserve credit for restoring to a place of honor the great texts of the prophets and of the Gospel in defense of the poor, go on to a disastrous confusion between the poor of the Scripture and the proletariat of Marx. In this way they pervert the Christian meaning of the poor, and they transform the fight for the rights of the poor into a class fight within the ideological perspective of the class struggle. For them the Church of the poor signifies the Church of the class which has become aware of the requirements of the revolutionary struggle as a step toward liberation and which celebrates this liberation in its liturgy. (Sacred Congregation for the Doctrine of the Faith, 1984).