...works older than two millennia which portray the fragility, flippancy, resolve and, ultimately, the meaning of the human condition; works whose very existence up until the modern day is testament to the breadth and depth of the subjects dealt with therein; works whose linguistic beauty far surpasses anything that has been written subsequently or, doubtless, will be
Please!!! The ancient Greeks and Romans were people just like you and me - they had faults too, some of them quite grevious. Misogynist, warmongering, intolerant (to other cultures) tendencies have become the salient views of certain modern cultures - when we can yet overlook the prevalence of these things in the Classical world!
And whence comes this notion that Classical art (in all forms, including literature) is the most beautiful art ever to have been created? Sure, the Classical world had its geniuses and achievements... but what makes those achievements any greater than the achievements of all other cultures, ancient, modern, and those yet to come?
Who can say that the art of this culture surpasses all others in beauty, when what constitutes 'beauty' cannot even be universally defined?
And even if beauty could be defined, how can you claim that anything is more beautiful than everything else, when you can't even make the comparison because you don't know what everything else entails? You can't have seen all the art that existed before and up to this point - let alone, that which has not yet been created!
As for the survival of the works... how is that a testament to their greatness? Even within the Classics there is so much that has been lost; you can't mean to say, for instance, that the surviving plays of Sophocles are his best works simply because they're the ones which survived?
How do you know that there was never existed something far more magnificent than that which the Classical world produced, but has been lost?
...I could go on.
I study the Classics because I feel a certain connection to aspects of ancient Greece - but I recognise that this is a personal, not a universal, attraction. I also readily recognise that there are things about ancient Greece which I don't like at all...
In general, there have been (and still are) so many cultures out there - and as each is unique with its own set of good and bad points, I just don't see that any one of them can be placed above others, except for our individual purposes. So - fair enough if you feel that a certain culture works better for you than others, but that doesn't make that culture universally better.