Your success in investing will depend in part on your character and guts, and in part on your ability to realize at the height of ebullience and the depth of despair alike that this too shall pass.
John C. BogleIn the long run, investing is not about markets at all. Investing is about enjoying the returns earned by businesses.
John C. BogleWhile the apostles of the new so-called "behavioral" theory present ample evidence of how often human beings make irrational financial decisions, it remains to be seen whether these decisions lead to predictable errors that create systematic mispricings upon which rational investors can readily and economically capitalize.
John C. Bogle