Note.---It is sometimes thought to be a necessary assumption of Hedonists that a surplus of pleasure over pain is actually attainable by human beings: a proposition which all extreme pessimist would deny. But the conclusion that life is always on the whole painful would not prove it to be unreasonable for a man to aim ultimately at mininimising pain, if this is still admitted to be possible; though it would, no doubt, render immediate suicide, by some painless process, the only reasonable course for a perfect egoist---unless he looked forward to another life.
ME Book 2 Chapter 2 Section 2