You're right. But it makes me think of Nelson Mandela in prison as an example.

Mandela said: - "I went for a long holiday for 27 years," Nelson Mandela once said of his years in prison. It was another example of the dry, razor-sharp and often self-deprecating humour...

This is an example of a person with a great, positive attitude who survived captivity.

So, I still maintain it comes from within.