The Strangest Secret

I listened to Earl Nightingale's recording from 1951 a few years back. I remember it being profound at the time, and was miffed that I couldn't even remember what the strangest secret actually was - so I listened to it again and am writing it here so I will remember for next time. I also recommend that you get this recording from Nightingale-Conant.

The Strangest Secret:
"You become what you think about the most."

I believe that if you consider this - you will realize that it is true.
So what are you thinking about these days?