[128] Two things teach man about his whole nature: instinct and experience. - Blaise Pascal

As to the objection that these rules are common in the world, that it is necessary to define every thing and to prove every thing, and that logicians themselves have placed them among their art, I would that the thing were true and that it were so well known... But so little is this the case, that, geometricians alone excepted, who are so few in number that they are a single in a whole nation and long periods of time, we see no others that know it.

Curiosity is only vanity. We usually only want to know something so that we can talk about it.

We desire truth and find in ourselves nothing but uncertainty.
We seek happiness and find only wretchedness and death.
We are incapable of not desiring truth and happiness and incapable of either certainty or happiness.
We have been left with this desire as much as a punishment as to make us feel how far we have fallen.