4. Protestant theologians as well as those of the Roman confession admit the maxims which I have just laid down, when they handle the matter with attention; and all that is said against reason has no force save against a kind of counterfeit reason, corrupted and deluded by false appearances. It is the same with our notions of the justice and the goodness of God, which are spoken of sometimes as if we had neither any idea nor any definition of their nature. But in that case we should have no ground for ascribing these attributes to him, or lauding him for them. His goodness and his justice as well as his wisdom differ from ours only because they are infinitely more perfect. Thus the simple notions, the necessary truths and the conclusive results of philosophy cannot be contrary to revelation. And when some [76] philosophical maxims are rejected in theology, the reason is that they are considered to have only a physical or moral necessity, which speaks only of that which takes place usually, and is consequently founded on appearances, but which may be withheld if God so pleases. 5. It seems, according to what I have just said, that there is often some confusion in the expressions of those who set at variance philosophy and theology, or faith and reason: they confuse the terms 'explain', 'comprehend', 'prove', 'uphold'. And I find that M. Bayle, shrewd as he is, is not always free from this confusion. Mysteries may be _explained_ sufficiently to justify belief in them; but one cannot _comprehend_ them, nor give understanding of how they come to pass. Thus even in natural philosophy we explain up to a certain point sundry perceptible qualities, but in an imperfect manner, for we do not comprehend them. Nor is it possible for us, either, to prove Mysteries by reason; for all that which can be proved _a priori_, or by pure reason, can be comprehended. All that remains for us then, after having believed in the Mysteries by reason of the proofs of the truth of religion (which are called 'motives of credibility') is to be able to _uphold_ them against objections. Without that our belief in them would have no firm foundation; for all that which can be refuted in a sound and conclusive manner cannot but be false. And such proofs of the truth of religion as can give only a _moral certainty_ would be balanced and even outweighed by such objections as would give an _absolute certainty_, provided they were convincing and altogether conclusive. This little might suffice me to remove the difficulties concerning the use of reason and philosophy in relation to religion if one had not to deal all too often with prejudiced persons. But as the subject is important and it has fallen into a state of confusion, it will be well to take it in greater detail.