Learning form learners

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 Don't tell me the moon is shining, show me the glint of light on broken glass.-Anton Chekhov

 My opinion:

I understand this expression this way: you should show some real evidence of your words. It shouldn't be just talking. Sometimes people try to pursuade us that some kind of  idea is good. And their speeches can be very beautiful and encouraging. But before we'll get involved in that we need to ask for a little demonstration of the idea. We need to be sure that behind those beautiful words the real deal  exists. Of course in the beginning it can be just a small example how the idea works. It just needs to show us that this is true. I have a comedy movie called 'Bluff' in my mind ,as an  example. The main characters of that movie are crooks. These two guys bought some land  along the marsh with frogs. And they declared that under this marsh there is a grave of great knight Zigfread. And his grave is full of hidden treasures. They organised excavations on this area and offered one lady to buy this land. And to prove their words they rented some gold coins and some armors from the museum. The words about the grave full of jewelry is a shining moon. And these gold coins are the way to urge that the legend is true. It's a glint of light. But of course it's a bluff. So the moral is you need to get evidence and check it and don't be naive.