I think that exact quotes in any retelling of a myth are challenging because translations always vary. It is important to keep this in mind in understanding how to pull details from myths. I do think that one can find a situation in which appearances can be deceiving in the fact that Zeus and Hermes approach the elderly couple's door as a pair of wandering travelers. Their appearances indicate that they are poor. They have designed their appearances to be one in which individuals are to test the generosity of human beings. The appearances in which they don is to show how external visions can be deceiving. The Gods, themselves, are depicted as wandering mendicants, in a sense. The fact that they have been turned away leading up to the home of Baucis and Philemon represents how people have to keep in mind that their own ego should be restrained in understanding how appearances can be deceived. Baucis and Philemon's humility and lack of ego is where they are able to show a sense of honor and understanding in accepting the visitors as treasures from the divine. It is for this reason that the visitors reveal themselves to Baucis and Philemon, granting them a boon in the process. In this, the myth shows that appearances can be deceiving.