"I don't want you to change. I want you... to always... be you"

So Merlin doesn't change.

Not even when the people he knows and loves fade and die around him.

He doesn't change.

Not even when the world transforms around him, becoming completely alien.

He doesn't change.

Not even when he wants to shed himself of his past to erase the pain.

He doesn't change.

Not even when he has experienced much more than any man should and could bear.

He doesn't change.

He doesn't change so that one day he can hear Arthur's voice say,

"You haven't changed at all."