What metaphors can you apply to that famous story "The Ugly Duckling"?

CasaNorba
you know that famous story we were told in kindergarden. were that poor ugly newborn duck gets rejected/neglected by his own family because he was different("ugly" from their point of view). this results him having issues growing up and adapting to the environment as time goes on. but in the end the tables turn as he becomes a big, strong and handsome swan...

so how can you imply this story to real life? I see a millions ways it does. one way I see it is that you should never give up on survival, you can't let you differences slow you down, and that looks don't matter, and to always keep hope alive. but what other morels can you find in this unique story?
What metaphors can you apply to that famous story "The Ugly Duckling"?
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