Theme- Tuck everlasting- Sometimes you must do the wrong thing for the right reason

This shows how even though Winnie breaking Mae out of prison is wrong, she's doing it for the right reason, which is that if she didn't it would affect the whole human race because they would figure out the Tucks secret.

This shows how even though Urashima opened the box which the princess told him not to because she loved him, he did for a good reason, which is he wanted to find his wife/the princess.