Source: Full Moon
“The world's most funniest and easiest thing is to give an advice…”
“It is so hard to leave—until you leave. And then it is the easiest goddamned thing in the world.”
Quentin "Q" Jacobsen, p. 229
Paper Towns (2008)
Don Soderquist “ Live Learn Lead to Make a Difference https://books.google.com/books?id=s0q7mZf9oDkC&lpg=pg=PP1&dq=Don%20Soderquist&pg=PP1#v=onepage&q&f=false, Thomas Nelson, April 2006 p. 87.
On Listening
Third Olynthiac http://books.google.com/books?id=n4INAAAAYAAJ&q="the+easiest+thing+in+the+world+is+self-deceit+for+every+man+believes+what+he+wishes+though+the+reality+is+often+different"&pg=PA57#v=onepage, section 19 (349 BC), as translated by Charles Rann Kennedy (1852)
Variants:
A man is his own easiest dupe, for what he wishes to be true he generally believes to be true.
As quoted in The Routledge Dictionary of Quotations (1987) by Robert Andrews, p. 255
There is nothing easier than self-delusion. Since what man desires, is the first thing he believes.
Letter to his mother, in [Lorien Foote, The Yankee Plague: Escaped Union Prisoners and the Collapse of the Confederacy, https://books.google.com/books?id=d4kwDAAAQBAJ&pg=PA14, 5 October 2016, University of North Carolina Press, 978-1-4696-3056-4, 14–]
