On the occasions when I have pondered over men's various activities, the dangers and worries they are exposed to at court or at war, from which so many quarrels, passions, risky, often ill-conceived actions and so on are born, I have often said that man's unhappiness springs from one thing alone, his incapacity to stay quietly in one room. A man wealthy enough for life's needs would never leave home to go to sea or beseige some fortress if he knew how to stay at home and enjoy it...
… let us say: 'Either God is or he is not.' But to which view shall we be inclined? Reason cannot decide this question. Infinite chaos separates us. At the far end of this infinite distance a coin is being spun which will come down heads or tails. How will you wager? Reason cannot make you choose either, reason cannot prove either wrong. . . Yes, but you must wager. There is no choice, you are already committed. Which will you choose then? . . . Let us weigh up the gain and the loss involved in calling heads that God exists. Let us assess the two cases: if you win you win everything, if you lose you lose nothing. Do not hesitate then; wager that he does exist. . . . And thus, since you are obliged to play, you must be renouncing reason if you hoard your life rather than risk it for an infinite gain, just as likely to occur as a loss amounting to nothing… Thus our argument carries infinite weight, when the stakes are finite in a game where there are even chances of winning and losing and an infinite prize to be won.
What a chimera then is man. What a novelty! What a monster, what a chaos, what a contradiction, what a prodigy. Judge of all things, imbecile worm of the earth; depositary of truth, a sink of uncertainty and error: the pride and refuse of the universe.
Anyone who considers himself in this way will be seized with terror and, discovering that the mass nature has given him supports itself between two abysses of infinity and nothingness, he will tremble in the face of these marvels; and I believe that as his curiosity changes to admiration, he will be more disposed to contemplate them in silence then search them out with presumption.
For, finally, what is man in nature? He is nothing in comparison with the infinite, and everything in comparison with nothingness, a middle term between all and nothing. He is infinitely severed from comprehending the extremes; the end of things and their principle are for him invincibly hidden in an impenetrable secret; he is equally incapable of seeing the nothingness from which he arises and the infinity into which he is engulfed.
http://www.wsu.edu/~dee/ENLIGHT/PENSEES.HTM
Man is but a reed, the most feeble thing in nature; but he is a thinking reed. The entire universe need not arm itself to crush him. A vapour, a drop of water suffices to kill him. But, if the Universe were to crush him, man would still be more noble than that which killed him, because he knows that he dies and the advantage which the universe has over him; the universe knows nothing of this.
He who does not know his way to the sea should take a river for his guide.
[Fr., Les rivieres sont des chemins qui marchant et qui portent ou l'on veut aller.]
We think very little of time present; we anticipate the future, as being too slow, and with a view to hasten it onward, we recall the past to stay it as too swiftly gone. We are so thoughtless, that we thus wander through the hours which are not here, regardless only of the moment that is actually our own.
Curiosity is only vanity. Most frequently we wish not to know, but to talk. We would not take a sea voyage for the sole pleasure of seeing without hope of ever telling.