
The Lessons of History (1968), p. 72 (co-authored with Ariel Durant)
22 August 1944
My Day (1935–1962)
Source: You Learn by Living: Eleven Keys for a More Fulfilling Life
The Lessons of History (1968), p. 72 (co-authored with Ariel Durant)
L'anisotropie de l'espace. La nécessaire révision de certains postulats des théories contemporaines. Les données de l'expérience (1997), p. 591
Source: Criticism and the Growth of Knowledge, 1970, p. 119.
Mark Twain in Eruption: Hitherto Unpublished Pages About Men and Events (1940) edited by Bernard DeVoto
Source: 1970s, The Economy of Love and Fear, 1973, p. 88 as cited in: Omicron Delta Epsilon, Omicron Chi Epsilon (1997) The American economist. Vol. 41-42. p. 20
“The measure of a man's real character is what he would do if he knew he would never be found out.”
citation needed
The earliest quotations of this give it as anonymous or unknown author. https://books.google.com/books?id=hPIsAAAAYAAJ&pg=PA321&dq=%22what+he+would+do+if+he+knew+it+would+never+be+found+out%22&hl=en&sa=X&ved=0CBwQ6AEwAGoVChMIlvi0prz_xwIVTwaSCh0hVwX5#v=onepage&q=%22what%20he%20would%20do%20if%20he%20knew%20it%20would%20never%20be%20found%20out%22&f=false https://books.google.com/books?id=i2MPAQAAIAAJ&pg=PA16-IA71&dq=%22what+he+would+do+if+he+knew+it+would+never+be+found+out%22&hl=en&sa=X&ved=0CB0Q6AEwAGoVChMIkMmp8rz_xwIV1BGSCh25lAO0#v=onepage&q=%22what%20he%20would%20do%20if%20he%20knew%20it%20would%20never%20be%20found%20out%22&f=false
Attributed
As quoted in "Lincoln's Imagination" by Noah Brooks, in Scribner's Monthly (August 1879), p. 586 http://books.google.com/books?id=jOoGAQAAIAAJ&pg=PA586
Posthumous attributions
Variant: Character is like a tree and reputation like a shadow. The shadow is what we think of it; the tree is the real thing.
Source: Language, Truth, and Logic (1936), p. 16.
Context: The criterion which we use to test the genuineness of apparent statements of fact is the criterion of verifiability. We say that a sentence is factually significant to any given person, if, and only if, he knows how to verify the proposition which it purports to express — that is, if he knows what observations would lead him, under certain conditions, to accept the proposition as being true, or reject it as being false.