"Our existence has no foundation on which to rest except the
    transient present. Thus its form is essentially unceasing
    _motion_, without any possibility of that repose which we
    continually strive after. It resembles the course of a man
    running down a mountain who would fall over if he tried to
    stop and can stay on his feet only by running on; or a pole
    balanced on the tip of the finger; or a planet which would
    fall into the sun if it ever ceased to plunge irresistibly
    forward. Thus existence is typified by unrest."

   "That which _has been_ no longer _is_; it as little exists as 
    does that which has _never_ been. But everything that _is_ 
    in next moment _has been_. Thus the most insignificant 
    present has over the most significant past the advantage of 
    _actuality_, which means that the former bears to the latter
    the relation of something to nothing."

   "Time is that by virtue of which everything becomes 
    nothingness in our hands and loses all real value."

    - Arthur Schopenhauer, "On the Vanity of Existence"

   "Nature Shows that with the growth of intelligence comes 
    increased capacity for pain, and it is only with the highest 
    degree of intelligence that suffering reaches its supreme 
    point."

   "Money is human happiness in the abstract: he, then, who is 
    no longer capable of enjoying human happiness in the concrete
    devotes his heart entirely to money."

   "How very paltry and limited the normal human intellect is, 
    and how little lucidity there is in the human conciousness, 
    may be judged from the fact that, despite the ephemeral 
    brevity of human life the uncertainty of our existence and 
    the countless enigmas which press upon us from all sides,
    everyone does not continually and ceaselessly philosophize, 
    but that only the rarest of exceptions do."

    -Arthur Schopenhauer (1788-1860), Essays and Aphorisms