Fable 201 - The Lion and the Frog

A lion, hearing a frog croak, roared back, thinking that such a sound must come from some large creature. He waited for a while,
then saw the creature emerge from a pond, went up to it and crushed it with his foot, saying:
‘So much noise from one so small!’

This fable applies to people who are all noise and have no substance to them.