Can you construct a new belief system?

If belief is a construct, then like any other construct, it can be manipulated and changed. And if that's the game that we're playing, if I can construct my belief system, if I can choose at any moment to believe something that's more empowering than I was believing the moment before, and that that will actually find its way into my actions, allow me to do things that I couldn't do the moment before, then it's like that moment in the Matrix where Neo realizes he knows Kung Fu. To me, the very fundamental purpose of life is to find out how many skills I can acquire that have utility and then put that utility to the test in service of something greater than myself.