Who you are... Who you are today is what you have thought about yesterday. When you are born, all of your nervous system in laid out in a matrix and, as you learn, you are simply "paving" the roads you take the most, and as you continue to do the same things, the roads you don't take start to fall away. This is why "you literally become what you think about over and over" This is the importance of continually doing new things, and also receiving regular chiropractic adjustments to stimulate all the nerve pathways that you don't use as much.
Today is my world, Tomorrow is a plan, and Yesterday was a lesson, so Today is where I live.
http://vimeo.com/34569320 to see chiropractic explained.
