Few businessmen are capable of being in politics, they don't understand the democratic process, they have neither the tolerance or the depth it takes. Democracy isn't a business.
Certainly, I think being depressed is absolutely part of the human condition, it has to be, if there's joy there's its opposite, and it's something you ride if you possibly can.
Real change isn't found in some new way to think about yourself, but in freedom from the need to think about yourself at all.