“The heart has its reasons which reason knows not.”

“The heart has reasons that reason cannot know.”

“We know the truth not only through our reason but also through our heart. It is through the latter that we know first principles, and reason, which has nothing to do with it, tries in vain to refute them.”

“We know the truth, not only be the reason, but also be the heart.”

“The last function of reason is to recognize that there are an infinity of things which surpass it.”

“Reason's last step is the recognition that there are an infinite number of things which are beyond it.”

“The heart has its order, the mind has its own, which uses principles and demonstrations. The heart has a different one. We do not prove that we ought to be loved by setting out in order the causes of love; that would be absurd.”