The span between two fixed points on a number line approaches zero as the span of the number line itself approaches infinity. Analogously, our existence from birth to death is the span between the two fixed points, and infinite time as the infinitely increasing number line. As such, from an infinite perspective, we approach zero, nothing, non-existence. For the finite being existence and non-existence are almost equivalent.
How is a man to continue living when he realizes that he is nothing? All his thoughts and all his actions are annulled. It makes no difference what he does; it is all equivalent to never having taken any action at all. Whether good or evil, strong or weak, right or wrong, man is and will forever be nothing. His finiteness is his undoing; he is a mirage, a specter, a figment.
How does he live with that? An ancient writer once said that the best thing for man is to never have been born, and, best after that, to die young, too young to become aware of his mortality, of his inevitable fate. But when a man has, by misfortune, lived long enough to become aware of this fact, how should he react? Continue living as he has, ignoring this fact? Annihilate himself before nature or circumstance beat him to it? Numb himself with drugs and alcohol? It does not matter. He can choose whichever course suits him and I suppose that’s all there is to it — assuming, of course, that he is free to choose.