All their principles are true, sceptics, stoics, atheists, etc...but their conclusions are false, because the contrary principles are also true. - Blaise Pascal

The heart has its reasons which reason knows nothing of... We know the truth not only by the reason, but by the heart.

« La vanité est si ancrée dans le cœur de l’homme qu’un soldat, un goujat, un cuisinier, un crocheteur se vante et veut avoir ses admirateurs ; et les philosophes mêmes en veulent. Et ceux qui écrivent contre veulent avoir la gloire d’avoir bien écrit ; et ceux qui lisent veulent avoir la gloire de l’avoir lu ; et moi qui écris ceci, ai peut-être cette envie ».

It is dangerous to explain too clearly to man how like he is to the animals without pointing out his greatness. It is also dangerous to make too much of his greatness without his vileness. It is still more dangerous to leave him in ignorance of both, but it is most valuable to represent both to him.
Man must not be allowed to believe that he is equal either to animals or to angels, nor to be unaware of either, but he must know both.