Changing Reality

I have a quote posted on a wall in my bedroom that I rarely even notice is there.  It says, "Wonderful one, are you beginning to understand that it's not reality that changes, it's what you believe that changes reality?" -Byron Katie

I've been thinking about the power of the mind and of mantras.  Mantras are defined as "a sound, syllable, word or group of words capable of creating transformation."  I am loosely referring to mantras as anything that we say or think repeatedly and with intention. 

I've gone through brief periods of time in my life when I've said mantras.  It seems to me that they actually do spur change.  Perhaps if we repeat something frequently enough, we really can transform our reality.  Or perhaps, through the repetition, we simply convince ourselves that what we're saying is true, leading us to make different choices which in turn change our reality.  I don't know how mantras work, but it indeed appears that they do.  I wonder, then, why I never seem to continue saying them on a regular basis.  I'm committing to saying mantras for 5 minutes every morning for a month. We'll see what happens.