Kingdom Hearts Light? But why?

At the end of kh1, Xehanort's heartless is ultimately defeated by light.... Before he dies though,
He says: Light, but why? In the manga though, he says: Light? So warm....

Even though it is a few unnoticed words, I think it has some importance...... They make it where you can barely
here him say the words, and in the manga they make it so you can't read it.......
Perhaps he is questioning his studies..... In ansem's study it says Door to Darkness. Not Door to Light.....
and the fact that his portrait was hiding it.......... Door to Darkness, All of the original members
were turned into nobodies, Could it have been an experiment....... In the cutscene with mickey and Ansem,
Ansem tells Xehanort to not violate the heart of all worlds...... Thinking his experiment was right he
rebelled against Ansem........ And him and his assistants performed an experiment to create the door to darkness...
during that experiment, All 7 assistants were overcome by darkness and turned into heartless.......

 

Yeah....So what's your point?