Iroh

"That is one of the cores of bending after all. When we bend an element it both changes and yet stays the same. You can use bending to pull a breeze from a hurricane, it is yet the same wind. When you pull water from the ocean then return it, it fits right back into the water that birthed it. Take fire from a torch and it burns the same in your hand. You can make a orb of earth, it remains stone. We all change, we all can change. And yet who we are is always the same. The important parts of us remain, always."