In a recent essay Duncan Pritchard argues that there is no fundamental epistemological distinction between religious belief and ordinary or non-religious belief. Both of them – so he maintains in the footsteps of Wittgenstein's On certainty – are ultimately grounded on a-rational commitments, namely, commitments unresponsive to rational criteria. I argue that, while this view can be justified theologically, it cannot be advanced philosophically as Pritchard assumes.
I offer an account of Aquinas's reflection on faith and reason to show that the theologian – not the philosopher – is entitled to deal with a-rational commitments, because the truths of faith can be seen as simply intellectual – like the rational statements considered by the philosopher – but also as decisions made by way of divine grace. I also suggest that Pritchard's thesis may be re-proposed on a new basis, if Aquinas's theological stance were reinterpreted so as to point out unexpected connections between theology and philosophy.