A penny saved is a penny earned is an old saying coined by Benjamin Franklin. It refers to the value of the money that is saved over the money that is spent right away.

Beethoven likes to write music when he is inspired or something happened to him that gives him a very good idea of how his song shall sound and last when he hears something dramatic or is in something dramatic then he writes a song about that just like his song "the rage over the lost penny"

It means you have lost a pound of money and found only a penny.

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Road rage is a aggressive driving incident where the driver has gotten so angry that he/she has lost control.