how can men be virtuous in a wicked world, or happy in a world of suffering?
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“When political power passed into the hands of the Macedonians, Greek philosophers, as was natural, turned aside from politics and devoted themselves more to the problem of individual virtue or salvation. They no longer asked: how can men create a good State? They asked instead: how can men be virtuous in a wicked world, or happy in a world of suffering? The change, it is true is only one of degree; such questions had been asked before, and the later Stoics, for a time, again concerned themselves with politics—the politics of Rome, not of Greece. But the change was none the less real.” source