Know thy self?

If only I had a penny for every time some guru of success talks of 'Know Thy Self', I'd probably not need them...other than to tell me 'Know Thy Self' and adding a penny to my vast coffers. I mean, I rank this 'Know Thy Self' alongside 'Don't think of mangos'. Advice someone to do the impossible in order to achieve whatever and you can maintain your status as a guru indefinitely. After all, your