I might have paraphrased Kyle Katarn's line a bit, but during your training mission at the Jedi temple on Yavin, Kyle basically says no power is inherently good or evil and it's how you use the power that determines the morality. The game then immediately gives you points with which to spend on Force powers, of which are clearly labeled dark side or light side... So what was Kyle referring to? Was he talking about powers like push or pull? Was it just filler chat while the training was going on?