This is a book which sums up the difference between millionaire and middle class.

10: Millionaires think long-term; the middle class thinks short-term.
9: Millionaires talk about ideas; the middle class talk about things and other people.
8: Millionaires embrace change; the middle class feel threatened by change.
7: Millionaires take calculated risks; the middle class is afraid to take risks.
6: Millionaires continually learn and grow; the middle class thinks learning ended with school.
5: Millionaires work for profits; the middle class works for wages
4: Millionaires believe they must be generous; the middle class believes it can’t afford to give
3: Millionaires have multiple sources of income; the middle class has only one or two.
2: Millionaires focus on increasing their net worth; the middle class focuses on increasing its paychecks.
1. Millionaires ask themselves empowering questions; the middle class asks dis-empowering questions.

The Top 10 Distinctions Between Millionaires and the Middle Class