Two significant aspects of Thomas Reid's thought seem to be irreconcilable with one another. On the one hand, Reid constantly refers to the substantive benefits which human knowledge receives from the Christian revelation. On the other hand, he does not justify philosophical or scientific beliefs by way of appeal to God. In this essay, I argue that a closer inspection of both Reid's philosophical reflection and scientific investigations shows that the two aspects just mentioned are compatible with one another. In (...) short, although an influence on rational investigation is somehow exerted by divine revelation, this does not limit the autonomy of reason, which is actually stimulated and promoted precisely because of a religiously rooted confidence in our rational faculties. (shrink)