In other words, there is a correlation between the rationality of human thinking and the rationality imprinted indelibly in nature. At the same time when Wesley rightly insisted on the place of reason in the economy of grace he was not countenancing rationalism. Christians are always to be rational, never rationalistic. In other words, there is nothing that needs to be revealed and nothing that can be. Here reason is no longer a servant of faith but rather that which similarly renders faith a non-category.
Rationalism assumes, in the second place, that reason is unimpaired.
Marx showed us as much in the sphere of economics. So have contemporary sociologists of knowledge with their focus on the place of the reasoner's social location. And before all of this so did the pastoral counsel of patristic writers. Reason, together with the rest of the creation, has not been spared the ravages of the Fall. Reason needs the corrective of the gospel.