How the raven got its black feathers - by Klara

Klara has read a Native American legend in her English class and here's a summary she worked out:

The raven wants to make all the birds look different. He goes to the four Great Spirits with his idea and asks them for paints and brushes. The Spirits agree and the raven requires in exchange that the Spirits paint him the most beautiful bird in the world. When the raven is finished, he wants the Spirits to keep their promise, but he isn't content with the way they paint him. This makes the Spirits angry, and they pour all the paint over him so that all the colours mix into a deep black.
The raven's idea is clever, but his stupid and vain behaviour ruin everything.

What can we learn from this story?