What does it mean when you were not well-behaved when you were young, but you admired the birds flying in the distant mountains?

“When I was not well-behaved when I was young, I admired the birds in the distant mountains.” It means that although I was not well-behaved as a child, I admired the free-flying birds in the distant mountains.

This expresses a yearning for freedom and unrestrainedness, and also hints at the nostalgia for childhood and the cherishment of simple life.