“Remember happiness doesn't depend upon who you are or what you have; it depends solely on what you think.”

Dale Carnegie
Original source
As quoted in ''Plenty of Time to Sleep When You're Dead : A Compilation of Life-changing Quotes'' (2006) by Richard Caridi

Recommended reading

Curated resources for this quote coming soon.

Verification: Imported from Wikiquote (CC-BY-SA); admin-approved