Once I went to the aquarium with my friends.
A passenger asked the administrator, "How old will this shark grow ?"
The administrator pointed at the aquarium and said, "it depends on how big your aquarium is ."
The passenger asked again, "Is it as big as an aquarium ?"
The administrator said carefully, "If in the aquarium, the shark can only be limited to the size of a few meters. If in the ocean, it will be so big that it can swallow a lion ."
Enlightenment: environment can change one's thought. Environment can restrict people's thoughts, and people can also restrict their own thoughts. Don't frame yourself. If you can't change the environment, you should start with changing yourself.