为是最明智的和杰出的教务在巴黎神学学部医生所赐予。
    动机诱使我向你这个伤寒是如此出色，而且，当你成为它的设计熟悉，我相信，你也会有这么优秀的在你保护它，我觉得一个动机，我不能做的更好，为了使在某种可以接受你，比用几句话说明什么我给自己定下的事。我一直认为这两个问题，尊重上帝和灵魂是对那些应该主要是由哲学而不是神学的论据证明。因为虽然这对我们来说是相当足够的忠实信仰者所接受的事实意味着，人的灵魂不会消亡的身体，上帝存在，它的确似乎不可能永远说服任何宗教的异教徒，事实上，我们几乎可以说，任何道德美德，除非首先，我们证明了由自然原因就是这两个事实。而且因为经常在此生活更好的报酬是比德副提供，很少有人会喜欢的有益的权利，限制了他们的敬畏神，也不是另一个生命的期望既不;，虽然它是绝对正确的我们必须相信，有一个上帝，因为我们是如此教导圣经，并在另一方面，我们必须相信圣经，因为他们来自神（此是，原因是，作为一个信仰上帝的礼物，他是谁给的宽限期，以使我们相信其他的东西同样可以给它使我们相信他存在），但我们不能发生在异教徒这个论点，谁可以指责我们的推理成一个圆圈。
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    TO THE MOST WISE AND ILLUSTRIOUS THE DEAN AND DOCTORS OF THE SACRED FACULTY OF THEOLOGY IN PARIS.
    The motive which induces me to present to you this Treatise is so excellent, and, when you become acquainted with its design, I am convinced that you will also have so excellent a motive for taking it under your protection, that I feel that I cannot do better, in order to render it in some sort acceptable to you, than in a few words to state what I have set myself to do. I have always considered that the two questions respecting God and the Soul were the chief of those that ought to be demonstrated by philosophical rather than theological argument. For although it is quite enough for us faithful ones to accept by means of faith the fact that the human soul does not perish with the body, and that God exists, it certainly does not seem possible ever to persuade infidels of any religion, indeed, we may almost say, of any moral virtue, unless, to begin with, we prove these two facts by means of the natural reason. And inasmuch as often in this life greater rewards are offered for vice than for virtue, few people would prefer the right to the useful, were they restrained neither by the fear of God nor the expectation of another life; and although it is absolutely true that we must believe that there is a God, because we are so taught in the Holy Scriptures, and, on the other hand, that we must believe the Holy Scriptures because they come from God (the reason of this is, that, faith being a gift of God, He who gives the grace to cause us to believe other things can likewise give it to cause us to believe that He exists), we nevertheless could not place this argument before infidels, who might accuse us of reasoning in a circle.