To doubt is a misfortune, but to seek when in doubt is an indispensable duty. So he who doubts and seeks not is at once unfortunate and unfair.
Blaise PascalIt is not shameful for a man to succumb to pain and it is shameful to succumb to pleasure.
Blaise PascalIl n'est pas certain que tout soit incertain. (Translation: It is not certain that everything is uncertain.)
Blaise PascalSince [man] is infinitely removed from comprehending the extremes, the end of things and their beginning are hopelessly hidden from him in an impenetrable secret; he is equally incapable of seeing the nothing from which he was made, and the infinite in which he is swallowed up.
Blaise Pascal