Since the Word is God, the inner principle of God's own mind, the logos, has been imprinted indelibly on the creation. Science is possible only because there is a correlation between patterns intrinsic to the scientist's mind and intelligible patterns in the physical world. Otherwise put, science is possible only because there is a correlation between the structure of human thought and the structure of the physical world, when the logos of God is the origin of this correlation. 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.