Arthur Schopenhauer
Publisher: Dover Publications (2006)

Human life must be some kind of mistake.  The truth of this will be sufficiently obvious if we only remember that man is a compound of needs and necessities hard to satisfy; and that even when they are satisfied, all he obtains is a state of painlessness, where nothing remains to him but abandonment to boredom.  This is direct proof that existence has no real value in itself; for what is boredom but the feeling of the emptiness of life?  If life - the craving for which is the very essence of our being - were possessed of any positive intrinsic value, there would be no such thing as boredom at all: mere existence would satisfy us in itself, and we should want for nothing.'