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. The skeptics have no other object than that, and they work at it to no purpose. We know that we are not dreaming, but, however unable we may be to prove it rationally, our inability proves nothing but the weakness of our reason, and not the uncertainty of all our knowledge, as they maintain. For knowledge of first principles, like space, time, motion, number, is as solid as any derived through reason, and it is on such knowledge, coming from the heart and instinct, that reason has to depend and base all its argument… It is just as pointless and absurd for reason to demand proof of first principles from the heart before agreeing to accept them as it would be absurd for the heart to demand an intuition of all the propositions demonstrated by reason before agreeing to accept them. Our inability must therefore serve only to humble reason, which would like to be judge of everything, but not to confute our certainty. As if reason were the only way we could learn!
Two excesses: to exclude reason, to admit nothing but reason.
Reason’s last step is the recognition that there are an infinite number of things beyond it. It is merely feeble if it does not go as far as to realize that. If natural things are beyond it, what are we to say about supernatural things?
Blaise Pascal (from Pensées)