evidence: Quote Investigator: Researcher Anna Berkes of Monticello.org states that the quotation has not been found in any of the writings of Thomas Jefferson, and the ascription is deemed spurious.[1]Website: Thomas Jefferson: Monticello, Article title: Nothing can stop the man with the right mental attitude… (Spurious Quotation), Article author: Anna Berkes, Creation date on website: April … Continue reading [...] Changing the mental attitude from the wrong to the right is all that most people need to do to enjoy all that life has to offer. [...] In conclusion, W. W. Ziege is the leading candidate for creator of this statement based on the 1948 appearance in "Forbes" magazine. The phrases "right mental attitude" and "wrong mental attitude" were used decades earlier to express a similar idea. The ascription to Thomas Jefferson is unsupported.