Cliche is bad in writing for a number of reasons. First of all it is uninteresting. Secondly, most cliches are outdated and people aren't always sure what they originally stood for. Cliches can confuse writing, so don't use them. Another reason to avoid cliche is the problem of connotation.
Most cliches start out as idioms which are peculiar to a particular culture.
Through verbal laziness, this idiom became cliche and was passed to the English language. We can only guess what it means. Because we never lived in the Ancient Greek culture. We have our own culture, our own experiences. Such an outdated cliche could not possibly express our experience as well as a phrase that we have created ourselves.