Platitudes often take the form of tautologies, e.g., "it is what it is", making them appear vacuously true. But the phrase is used to mean "there is no way of changing it", which is no longer a tautology: "Structuring the sentiment as a tautology allows it to appear inescapable." At the same time, some phrases that have become platitudes may provide useful moral guidance, such as "do unto others as you would have them do unto you". Others, though widely trivialized, may be thought-provoking, such as "Be the change you wish to see in the world".