“…stripping away denial and rationalization you start coming to the truth of who you really are…”
– Tiger Woods,
2010, March 21st, ESPN interview
This cannot be done by just looking in mirror 
It takes time on real thinking!
Second real thought:
“The happiness of your life depends upon the quality of your thoughts”
– Marcus Aurelius Antoninus Augustus
Roman Emperor (121-180)
The actions from the quality thoughts would produce visible happiness as well.