The story about Gandhi's shoe teaches us to make something good out of a loss.
Gandhi was boarding a train one day with a number of companions and followers, when one of his shoes slipped off from his foot and disappeared in the gap between the train and platform. Unable to retrieve it, he took off the other shoe as well and threw it on the track right at the spot where the first one was stuck.
The astonished passengers asked: Why are you throwing the other shoe onto the track?
Gandhi replied to the puzzlement of his fellow travellers and explained that a poor person who finds a single shoe is no better off - what's really helpful is finding a pair.