Here there are for you two very short fables from Aesop. Aesop was a writer of the ancient Greece, lived around 2600 years ago. He can be considered the creator of the fable (in the writing form), and his tales characterized ofted by humanized-animals character (such as in "The fox and the grape" or "The ant and the grasshopper") have a deep educative purpose and becoming very famous all around the world had been a strong influence everywhere.
A turtle used to beg an eagle because he wanted to be taught how to fly, and more the eagle demonstrated her that it was something alien to his nature, the more the other insisted in his begging. So one day the eagle grabbed her with his claws, raised him up in the air and then dropped her down. The turtle fell down on a rock and got smashed.
The tale shows how, despite of wise advices, for imitating the others we lead ourselves to ruin.
(Television? European lifestyle? .....be yourself!)
A fox that had never seen a lion before, the first time that casually came across him, felt so terrified out of his view that almost died. When he saw him a second time, he got scared yes, but not as much as the first time. When then he saw him the third time, found so much courage enough for getting close to him and even to chat him up.
The tale shows that the habit make tolerable even the most dreadful things.
(That's referred to learning English :D )