"Interestingly, koi, when put in a fish bowl, will only grow up to three inches.

When this same fish is placed in a large tank, it will grow to about nine inches long.

 

 

In a pond koi can reach lengths of eighteen inches. Amazingly, when placed in a lake, koi can grow to three feet long.

 

 
The metaphor is obvious. You are limited by how you see the world."

–via Vince Poscente