One day Akbar asked his courtiers if they could tell him the difference between truth and falsehood in three words or less. The courtiers look at each other in bewilderment, but couldn't find an answer. The emperor finally turned to Birbal. 'Four fingers' said Birbal. The emperor was confused, but Birbal elaborated. 'That's the difference between truth and falsehood, your Majesty. Everything you see with your own eyes is the truth. But what you hear with your ears may or may not be true. More often than not, it's likely to be false.' But Akbar didn't get the point of ' four fingers.' To which Birbal replied – 'The distance between one's eyes and one's ears is the width of four fingers.'
The moral of the story is to trust your eyes and nothing else.