Full Idea
Nothing else can be stated as the aim of our existence except the knowledge that it would be better for us not to exist.
Gist of Idea
The only aim of our existence is to grasp that non-existence would be better
Source
Arthur Schopenhauer (The World as Will and Idea [1819], II 605), quoted by Christopher Janaway - Schopenhauer 8 'Denial'
Book Reference
Janaway,Christopher: 'Schopenhauer' [OUP 2002], p.110
A Reaction
Nonsense on stilts. Nietzsche rebelled against this. If there is such 'knowledge' then it obviously has nothing to do with the aim of our existence. It is just a rejection of aims. The aim is making the best of existence, not spurning it.
Related Idea
Idea 18231 Anaxagoras said a person would choose to be born to contemplate the ordered heavens [Anaxagoras]