The Order and Mode of Procedure in this Work

THERE is then a twofold sort of truth in things divine for the wise man to study: one that can be attained by rational enquiry, another that transcends all the industry of reason. This truth of things divine I do not call twofold on the part of God, who is one simple Truth, but on the part of our knowledge, as our cognitive faculty has different aptitudes for the knowledge of divine things. To the declaration therefore of the first sort of truth we must proceed by demonstrative reasons that may serve to convince the adversary. But because such reasons are not forthcoming for truth of the second sort, our aim ought not to be to convince the adversary by reasons, but to refute his reasonings against the truth, which we may hope to do, since natural reason cannot be contrary to the truth of faith. The special mode of refutation to be employed against an opponent of this second sort of truth is by alleging the authority of Scripture confirmed from heaven by miracles. There are however some probable reasons available for the declaration of this truth, to the exercise and consolation of the faithful, but not to the convincing of opponents, because the mere insufficiency of such reasoning would rather confirm them in their error, they thinking that we assented to the truth of faith for reasons so weak.*

According then to the manner indicated we will bend our endeavour, first, to the manifestation of that truth which faith professes and reason searches out, alleging reasons demonstrative and probable, some of which we have gathered from the books of philosophers and saints, for the establishment of the truth and the confutation of the opponent. Then, to proceed from what is more to what is less manifest in our regard, we will pass to the manifestation of that truth which transcends reason, solving the arguments of opponents, and by probable reasons and authorities, so far as God shall enable us, declaring the truth of faith. Taking therefore the way of reason to the pursuit of truths that human reason can search out regarding God, the first consideration that meets us is of the attributes of God in Himself; secondly of the coming forth of creatures from God; thirdly of the order of creatures to God as to their last end.*

1.8 : Of the relation of Human Reason to the First Truth of Faith
1.10 : Of the Opinion of those who say that the Existence of God cannot be proved, being a Self-evident Truth