1609 MS (Trinity College, Cambridge) 85 Seeing is leeving. 1639 Parœmiologia Anglo-Latina 90 Seeing is beleeving. 1712 Lewis Baboon iv. There's nothing like Matter of Fact; Seeing is Believing. 1848 Guesses at Truth (ed. 2) 2nd Ser. 497 Seeing is believing, says the proverb … Though, of all our senses, the eyes are the most easily deceived, we believe them in preference to any other evidence. 1975 Our Man in Camelot v. ‘Show him the stuff … Let him make his own mind up.’ ‘Okay. Maybe you're right at that. Seeing is believing, I guess.’ trust and scepticism