If you can master:

Mentally, the worst feeling is :

"Mentally, the worst feeling is feeling unwanted by the one person you want the most."

Lost money can be found but :

"Lost money can be found. Lost time is lost forever. Protect what matters most."

You are wealthy when you :

"You are wealthy when you can freely decide what to do with your time."

You'll never live a happy life if :

"You'll never live a happy life if you always care about what others think about you."