Do you believe that people can change?

[p4pking]

How you react to things is a lot different than who you are though, and something you absolutely can control and change.

You can control and change both your reaction and who you are. Most of the time, how you react depends on who you are. I kinda get what your trying to say though.

You might change who you are to others by reacting differently, which in turn is self fulfilling. What actually causes you to react either way was always there, it's a matter of how you process things. I'm not big into these arguments, but this sort of comes down to whether you believe in free will and that jazz. People are not rational creatures, we are usually compelled to make the decisions we do, one way or another.