'A pithy observation that contains a general truth, such as, “if it ain’t broke, don’t fix it.”.
• A concise statement of a scientific principle, typically by an ancient classical author.' This the definition of the term aphorism, you can find in the Oxford dictionary; but I think it is more particular and specific in Philosophy. I have understood that with my students and Eraclito. Today, in the morning, I was saying something interesting about him, but you know, Eraclito is said the obscure and for them he and his Philosophy are dark as night is. Pantha rei? What is Pantha rei'? They were asking to me. I told them that it is one of the most famous and pregnant aphorisms in the History of Philosophy but they could not understand yet. So it became into my mind an idea: tell them some other aphorisms. 'Love is a difficult dream, wanted by everyone.' 'Life is a long trip, but you can make it shorter', and some more. Then I said:'Now it is your round, you have the chance to try alone. Write a really personal aphorism and we will read them, any of yours'. I listened to very good and significant short sentences. They knew how to use this tecnique to express something important and philosophical. They were ready to understand the motto 'Pantha rei'. What does it mean? It is the explanation, simple but clear, of the becoming, of the change of things, of the mutuation of nature and man. Science has understood this option only recently. We need Philosophy before.