We must "be able to pass easily"; but that of course is exactly what we cannot do. For the most part the choruses, with all their obscurities, must be spelt out and their symmetry mauled. But we can guess that Sophocles used them not to express something outside the action of the play, but to sing the praises of some virtue, or the beauties of some place mentioned in it. He selects what he wishes to emphasise and sings of white Colonus and its nightingale, or of love unconquered in fight. Lovely, lofty, and serene his choruses grow naturally out of his situations, and change, not the point of view, but the mood.