Smallville, Season 3

Lex:
It's ironic. In the most remote solitude I still managed to find an enemy. I suppose I was just hallucinating from malaria, but the enemy I found was real. I got a good look at myself, or at least the part I've always tried to ignore.

Clark:
Lex, I guess we all got to take a look at our dark side sooner or later.

Lex:
The problem is if you stare at it long enough, it can get hard to tell the two sides apart.