A mother firefly and her brood were out for a walk. 'Whatever happens,' mom ordered, 'don't shine your light. I don't want you eaten by owls.'

Sure enough, after a little while, she spotted the youngest one glowing behind her. 'You heard what I said,' scolded the mother. 'Why did you disobey?'

'Well,' said the little one, 'when you gotta glow, you gotta glow.'