Reading about Stoicism, I have encountered a criticism to which I cannot form a strong counter-argument. Did anyone or can anyone provide a rebuttal to the following argument against Stoicism?
There is, in fact, an element of sour grapes in Stoicism. We can't be happy, but we can be good; let us therefore pretend that, so long as we are good, it doesn't matter being unhappy. This doctrine is heroic, and, in a bad world, useful; but it is neither quite true nor, in a fundamental sense, quite sincere.
Bertrand Russell, A History of Western Philosophy (The PDF link will take a few minutes to load.)