Pine trees can't grow in flowerpots, and birdcages can't fly out of places where eagles come from.

Pine trees can't grow in flowerpots, and eagles can't fly in birdcages. This is a proverb. Metaphorically speaking, people can't exercise and grow in a comfortable environment.

Growth environment affects growth goals. This is the truth in the story of Meng Mu's three movements. So changing the environment is as important as changing yourself. If the external environment cannot be changed, we must change our pursuit and direction.